Mysteries of the Past (H2)
Listen to Course
0:00
0:00
EN: The modal verb 'must' is used here to express strong logical deduction or certainty based on evidence. When followed by a base verb (like 'be'), it indicates a strong belief about a present state.
She must be tired after the long flight.
EN: The phrase 'thousands of' is used to express a large, indefinite number. Note that 'thousands' is plural and is followed by 'of' plus a plural noun.
There are thousands of stars in the sky.
EN: The modal structure 'might have + past participle' is used to express a weak possibility about a past event. It suggests that something possibly happened, but the speaker is not entirely sure.
She might have missed the train.
EN: The past participle 'used' is the third form of the regular verb 'use'. In this sentence, it combines with 'might have' to form the past possibility aspect.
They have used this method for years.
EN: The modal verb 'could' is used here to express a possibility or a deduction about a present situation, indicating that the speaker is not 100% certain but thinks it is possible.
This key could be the one we lost yesterday.
EN: The prepositional phrase 'of an old temple' acts as an adjectival modifier, describing which whole the 'part' belongs to. 'An' is used because 'old' begins with a vowel sound.
He is a member of an international club.
EN: The modal structure 'can't have + past participle' is used to express a strong negative deduction or certainty about a past event. It means the speaker is almost certain that something did not happen.
She can't have left her keys at the office; I saw them on her desk at home.
EN: The preposition 'without' followed by a noun phrase ('without many people') indicates a condition that was lacking or absent, functioning as an adverbial modifier of manner or condition.
We cannot finish this project without your help.
EN: The modal verb 'may' is used to express possibility in the present or future. It indicates that something is possible but not certain. It is followed by the base form of the verb (in this case, 'tell').
It may rain later, so take an umbrella.
EN: The word 'ancient' is an adjective meaning belonging to the very distant past. It is used here to modify the noun 'story'. Note the pronunciation starts with a vowel sound, but it is preceded by 'an' because of the phonetic environment of the noun phrase 'an ancient story'.
We visited the ruins of an ancient city.
EN: The modal verb structure 'must have + past participle' is used to express a strong, logical deduction or certainty about a past event. It means the speaker is almost sure that something happened based on evidence.
She must have left her keys at the office.
EN: The adverb phrase 'long ago' is used to refer to a time far in the past. It typically modifies verbs to indicate that the action occurred a great distance back in time.
Dinosaurs lived on Earth long ago.
EN: The modal verb 'might' is used to express weak possibility or uncertainty about a present or future situation. It is followed by the base form of the verb (bare infinitive).
It might rain later, so take an umbrella.
EN: The phrasal verb 'lead to' means to result in a certain place or situation. When referring to physical paths, it indicates the destination the path reaches.
EN: The modal structure 'could have + past participle' is used to express a past possibility—something that was possible in the past but is not certain.
She could have missed the train.
EN: The preposition 'for' followed by a period of time (e.g., 'for many years') is used to express the duration of an action or state.
They lived in Paris for five years.
EN: The modal structure 'must have + past participle' is used to express a strong logical deduction or certainty about a past event. It means 'it is almost certain that something happened'.
She must have forgotten her keys because she couldn't open the door.
EN: 'Know a lot about' is a common phrasal expression meaning to have extensive knowledge or information regarding a specific subject.
He knows a lot about ancient history.
EN: In ancient civilizations, astronomy (studying the stars) was crucial for agriculture, navigation, and religious rituals. This sentence reflects the modern wonder at how ancient peoples achieved complex architectural alignments with celestial bodies without modern technology.
EN: The modal verb 'can't' followed by a base verb is used to express a strong negative deduction. It means the speaker is almost certain that something is impossible based on present evidence.
It can't be him; he is currently in New York.
EN: The linking verb 'look' is used to describe appearance. It is followed by an adjective (e.g., 'straight') to describe the subject. The adverb 'too' is used before the adjective to mean 'more than enough' or 'excessively'.
This soup looks too salty.
EN: The modal structure 'may have + past participle' is used to express a possibility about a past event. It suggests that something was possible in the past, but we are not 100% certain.
She may have missed the train.
EN: The phrase 'thousands of' is used to describe a large, indefinite number of people or things. It is always plural and followed by a plural noun.
Thousands of supporters gathered at the stadium.
EN: The modal verb 'might' is used to express a weak possibility or uncertainty about something happening. When combined with the adverb 'never', it indicates a strong likelihood that something will not happen, though it remains a possibility rather than a certainty.
We might never find the lost keys.
EN: The verb 'learn' in this context means to gain knowledge of or discover a fact, rather than the general process of studying. It is followed by the direct object 'the whole truth'.
She wanted to learn the reason behind his decision.
EN: The structure 'fill someone with something' is a transitive verb pattern used to express that a particular feeling, emotion, or quality is strongly caused in a person by something.
The beautiful music filled her with joy.
EN: The word 'wonder' is used here as an uncountable noun meaning a feeling of surprise mingled with admiration, caused by something beautiful, unexpected, or inexplicable.
The children looked at the starry sky with wonder.
EN: The modal structure 'must have + past participle' is used to express a strong, logical deduction or certainty about a past event. It means the speaker is almost 100% sure that something happened in the past based on present evidence.
She must have forgotten her keys because she cannot open the door.
EN: The infinitive phrase 'to move' acts as an adverbial modifier of purpose or result, explaining what the 'great skill' was needed for.
We need a map to find the way.
EN: The relative clause 'who built them' is an adjective clause used to modify the noun 'The people'. It starts with the relative pronoun 'who', which acts as the subject of the relative clause.
The students who finished the test early were allowed to leave.
EN: The modal structure 'might have + past participle (had)' is used to express a weak possibility or speculation about a past event.
She might have missed the train because she left late.
EN: The phrase 'can't be sure' is used to express uncertainty. It is often followed by a noun clause starting with a question word (like 'how', 'what', or 'why') to specify what is uncertain.
I can't be sure when the meeting will start.
EN: The structure 'such + adjective + plural noun' is used to emphasize the quality of the noun (meaning 'of this extreme degree').
It is rare to see such beautiful flowers in winter.
EN: The modal structure 'could have + past participle' is used to express a past possibility. It suggests that something was possible in the past, though we may not know for certain if it actually happened.
They could have built the temple for religious ceremonies.
EN: The adjective 'ancient' refers to something belonging to the very distant past. It is often used to describe historical structures, civilizations, or artifacts.
We found ancient coins near the river.
EN: The modal verb 'may' is used to express possibility in the present or future. It suggests that something is possible but not certain. It is followed by the base form of the verb (in this case, 'show').
The weather may change later in the afternoon.
EN: When listing three or more items, we use commas to separate them, and the coordinating conjunction 'or' (or 'and') before the final item. This is known as a parallel structure, where all items in the list should belong to the same grammatical category (here, all are nouns: 'gods', 'animals', 'daily life').
You can choose to study Spanish, French, or Japanese.
EN: The modal structure 'must have + past participle' is used to express a strong belief or logical deduction about a past event. It indicates that the speaker is almost certain that something happened in the past based on present evidence.
She must have left her keys at the office because she cannot open her house door.
EN: The coordinating conjunction 'and' is used to connect words, phrases, or clauses of equal grammatical rank. In this sentence, it connects two noun phrases 'the sun' and 'the stars' which function together as the compound object of the verb.
We love to watch the moon and the clouds at night.
EN: In archeology and history, the alignment of ancient structures with celestial bodies (like the sun and stars) is a common topic of study, known as archaeoastronomy. This sentence reflects the awe and logical deduction modern observers feel when looking at sophisticated ancient ruins.
EN: The modal structure 'might have + past participle' is used to express a weak possibility about a past event. It suggests that something was possible in the past, but the speaker is not entirely sure.
She might have missed the bus this morning.
EN: The noun phrase 'a place of prayer' uses the preposition 'of' to describe the purpose or function of the noun 'place'. 'Prayer' is an uncountable noun here referring to the act of praying.
This room is a place of study.
EN: The modal structure 'can't have + past participle' is used to express a strong negative deduction or disbelief about a past event. It means the speaker is almost certain that something did not happen.
She can't have left her keys at the office; I saw her lock the door.
EN: The preposition 'without' can be followed by a gerund (verb-ing) to indicate an action that did not happen or was avoided during the main action. It translates to 'without doing something'.
He solved the puzzle without looking at the instructions.
EN: The modal structure 'may have + past participle' is used to express a possibility about a past event. It suggests that something was possible in the past, but the speaker is not entirely certain.
She may have missed the train this morning.
EN: The phrase 'long since' is an adverbial phrase meaning 'long ago' or 'for a long time'. When placed before an adjective or past participle like 'gone', it emphasizes that the state has existed for a very long time.
The old customs have long since disappeared.
EN: The modal verb 'might' is used to express possibility (something that is possible but not certain). When combined with the adverb 'never', it indicates a strong possibility that something will not happen. The structure is 'Subject + might + never + base verb'.
We might never find the lost keys.
EN: The noun 'puzzle' literally refers to a game or toy designed to test ingenuity. In a figurative sense, as used here, 'puzzle of the past' refers to an unsolved mystery or a difficult problem from history.
EN: The adverb 'still' is used as a transition word at the beginning of a sentence to mean 'nevertheless' or 'despite what has just been said'. It helps to contrast the current statement with previous difficulties or doubts.
The map was old and torn. Still, we managed to find the way.
EN: The verb phrase 'bring someone closer to something' uses the preposition 'to' to indicate movement or progress toward a destination, goal, or state of understanding.
Every hour of practice brings you closer to your goal.
EN: Noun clauses as objects (indirect questions). When a question like 'What happened here?' is embedded inside another question ('Do you think...?'), it becomes a noun clause. The word order remains subject-verb if it's a statement, but since 'what' is the subject of the embedded clause here, the order 'what happened' is maintained.
What do you think she wants?
EN: Direct address. When addressing someone directly by name in English, the name is set off with a comma (or commas) to separate it from the rest of the sentence. It can be placed at the beginning, middle, or end of the sentence.
Where are we going, Tom?
EN: In English-speaking cultures, using someone's first name (like 'Emma') in conversation is very common and friendly. It helps to build rapport and keep the listener engaged, especially when exploring a mysterious or interesting place together.
EN: The modal structure 'must have + past participle' is used to express a strong logical assumption or certainty about a past event, based on present evidence. 'Must' acts as an auxiliary verb, and 'have' followed by the past participle (V3) indicates the past time frame.
She must have forgotten her keys; her car is still here.
EN: The adverbial phrase 'long ago' is used to refer to a time far in the past. It typically modifies the verb and is placed at the end of the clause.
Dinosaurs roamed the Earth long ago.
EN: The modal structure 'might have + past participle' is used to express a weak possibility about a past event. It suggests that something possibly happened, but the speaker is not entirely sure.
She might have missed the bus this morning.
EN: The past participle 'used' functions here as the main verb within the modal perfect construction ('might have used'), indicating the action that completed in the past.
They have used all the paper in the office.
EN: The modal verb 'could' is used here to express a weak or tentative possibility in the present or future. It suggests that something is possible, but the speaker is not entirely certain. It is followed by the base form of the verb ('be').
This key could open the back door.
EN: The phrase 'part of' is used to describe a piece, segment, or constituent element of a larger whole. It is typically followed by a noun phrase representing the whole.
Reading is an important part of learning a language.
EN: The modal structure 'can't have + past participle' is used to express a strong, logical deduction about a past event, meaning 'it is impossible that something happened'.
She can't have left her keys at the office; I saw them on the kitchen counter.
EN: The word 'alone' is used as an adverb here, meaning 'without help' or 'by oneself'. It emphasizes that the action was or could not be completed without assistance.
He solved the complex puzzle alone.
EN: The modal verb 'may' is used to express possibility or uncertainty in the present or future. It is followed by the base form of the verb (in this case, 'tell'). It suggests that something is possible, but not 100% certain.
It may rain later, so take an umbrella.
EN: The noun 'carvings' is the plural form of 'carving', which refers to a shape or pattern cut into wood or stone. Using the plural 'carvings' indicates there are multiple individual designs or inscriptions.
The ancient carvings on the cave wall are beautiful.
EN: The modal structure 'must have + past participle' is used to express a strong logical deduction or near-certainty about a past event. It means 'it is highly likely that something happened'.
She must have forgotten her keys because she cannot open the door.
EN: The phrasal verb 'know about' means to have knowledge or information about a specific topic or subject.
I don't know much about art, but I like this painting.
EN: The modal verb 'might' is used to express weak possibility or uncertainty about a present or future situation. It is followed by the base form of the verb (in this case, 'lead').
It might rain later, so you should take an umbrella.
EN: 'Somewhere hidden' uses post-modification, where an adjective ('hidden') modifies an indefinite pronoun ('somewhere') by placing it directly after the pronoun.
I want to go somewhere quiet this weekend.
EN: The modal verb 'might' is used to express a weak possibility or uncertainty about the future or present. When combined with the adverb 'never', it indicates that there is a strong chance something will not happen, though it remains a possibility.
He might never find his lost keys.
EN: The verb 'learn' in this context means to discover, find out, or become aware of information, rather than the traditional meaning of acquiring a skill or studying.
We only learned the news yesterday.
EN: The word 'each' is a distributive determiner used to refer to every individual member of a group. It is always followed by a singular countable noun ('clue') and a singular verb ('brings').
Each student has a unique talent.
EN: The verb 'bring' can be used in the pattern 'bring + object + adjective/adverbial' (brings us closer) to describe causing someone or something to move into a certain state or position.
The good news made us happy and brought us closer together.
Key vocabulary words with IPA pronunciation, definitions, example sentences, and interactive quizzes.
Phrases with type tags, bilingual definitions, usage notes, and example sentences.
To result in a particular place or situation; to guide to a destination.
A long time in the past.
Long ago; having occurred or finished a long time in the past.
To reduce the distance (physical or metaphorical) between someone/something and a goal or truth.