Pandemic & Prevention
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EN: The adverb 'fundamentally' is used to modify the verb 'changed', indicating that the change was deep and essential. In English, adverbs of manner often appear between the auxiliary verb/subject and the main verb.
The new technology fundamentally altered the industry.
EN: The phrase 'the way' acts as a noun phrase that can be followed by a relative clause (people... think) to describe how something is done. In this structure, 'how' or 'in which' is often omitted.
I like the way she explains complex ideas.
EN: The sentence reflects a global shift in mindset where 'public health' moved from a specialized medical topic to a common concern for every individual, highlighting the interconnectedness of modern society.
EN: The Past Perfect Tense (had + past participle) is used to describe an action that was completed before another point or action in the past. Here, it indicates the state of mind existing before the specific year 2020.
By the time the movie started, we had already finished our popcorn.
EN: The idiom 'take something for granted' means to fail to properly appreciate something because it is so common or familiar, or to assume something is true without questioning it.
We often take our health for granted until we get sick.
EN: The sentence reflects a global shift in consciousness. In many Western cultures, prior to COVID-19, wearing masks or extreme hand hygiene was often associated only with medical settings, whereas in some East Asian cultures, it was already more common during flu seasons. The pandemic unified these practices globally.
EN: Past Perfect Tense (had + past participle): Used to describe an action that was completed before another action in the past. Here, the virus spreading happened before the enforcement of measures.
By the time the police arrived, the thief had already escaped.
EN: Passive Voice (be + past participle): Used when the subject is the receiver of the action. 'Were forced' indicates that the governments and citizens did not choose this, but were compelled by circumstances.
The flight was cancelled due to the heavy storm.
EN: The phrase 'governments and citizens alike' reflects a collective responsibility often emphasized during global crises, highlighting that the pandemic affected all levels of society regardless of status.
EN: Gerunds as Subjects: A gerund is the '-ing' form of a verb that functions as a noun. In this sentence, three gerund phrases ('Wearing...', 'maintaining...', and 'washing...') act together as a compound subject.
Reading books and practicing speaking are effective ways to learn English.
EN: Parallel Structure: When listing multiple items or actions, they should follow the same grammatical form. Here, all three activities are presented as gerund phrases to maintain balance and clarity.
EN: The phrase 'social distance' became a global standard during the COVID-19 pandemic, though the specific distance (e.g., 1.5 meters or 6 feet) varied slightly by country. In many East Asian cultures, mask-wearing was already a common courtesy when sick, which facilitated quicker adoption compared to some Western countries.
EN: The structure 'One of the + superlative adjective + plural noun' is used to identify a specific item from a group of exceptional things. Note that the verb must be singular because the subject is 'One'.
One of the most talented students in the class was chosen for the award.
EN: The preposition 'during' is used to indicate that something happened within a specific period of time or throughout the course of an event.
Many people lost their jobs during the economic crisis.
EN: The sentence refers to the unprecedented speed of COVID-19 vaccine development, which typically takes 10-15 years but was achieved in under a year through global cooperation and mRNA technology.
EN: Non-defining Relative Clause: This uses 'who' to provide extra information about the subject (Scientists). It is separated by commas and can be removed without changing the core meaning of the sentence.
My brother, who lives in New York, is a doctor.
EN: Past Perfect Continuous Tense: Formed with 'had been' + present participle (-ing), it describes an action that started in the past and continued up until another point in the past.
They had been waiting for two hours before the train finally arrived.
EN: The phrase 'in record time' is a common idiom used to emphasize that something was completed faster than ever before, highlighting the unprecedented global collaboration during the COVID-19 pandemic.
EN: Past Perfect Tense (had + past participle): Used to describe an action that was completed before a specific point in time or another action in the past. In this sentence, the approval happened before the end of 2020.
By the time the movie started, we had already finished our popcorn.
EN: Prepositional Phrase 'By the end of': This phrase is used to indicate a deadline or a point in time by which something occurs. It is frequently paired with perfect tenses.
She will have completed the report by the end of the week.
EN: The term 'emergency approval' (or Emergency Use Authorization - EUA) became a common phrase during the pandemic. It refers to a regulatory mechanism that allows medical products to be used in a public health crisis before full formal licensure, provided they meet specific safety criteria.
EN: The conjunction 'Although' is used to introduce a subordinate clause that expresses a contrast or concession. In English, 'although' and 'but' are not used together in the same sentence structure.
Although the weather was cold, they decided to go for a walk.
EN: The Past Perfect tense (had + past participle) is used to describe an action that was completed before another action or time in the past. Here, the trials were completed before the concerns were fully addressed or before the current point of reference.
The train had already left when I arrived at the station.
EN: In scientific and medical contexts, 'clinical trials' refer to a highly regulated multi-phase process. Mentioning 'extensive clinical trials' is a common way in English-speaking media to reassure the public about the rigor of scientific evidence.
EN: The idiom 'play a role in' (followed by a noun or gerund) is used to describe the contribution or influence someone or something has on a situation. The adjective 'crucial' modifies 'role' to emphasize high importance.
Technology plays a significant role in modern education.
EN: The preposition 'in' is followed by the gerund 'slowing' (verb+ing). In English, prepositions must be followed by a noun or a gerund when expressing an action.
She is interested in learning new languages.
EN: The term 'quarantine' has historical roots in the Italian word 'quaranta' (forty), referring to the 40-day isolation period required for ships arriving in Venice during the Black Death. In the context of COVID-19, it became a globally recognized public health strategy.
EN: Past Perfect Passive (had been + past participle): This structure is used to describe an action that was completed in the passive voice before another point in the past.
The documents had been signed before the meeting started.
EN: Relative Clause (who...): A defining relative clause is used here to identify exactly which 'people' the sentence is referring to.
Students who finish the test early may leave the room.
EN: The term 'designated period' in a public health context often refers to the scientifically determined incubation period of a virus, which was typically 14 days during the early COVID-19 pandemic.
EN: The conjunction 'While' is used here to introduce a contrast between two ideas, similar to 'although'. It acknowledges one fact while presenting another that might seem contradictory or equally important.
While the new software is powerful, it is difficult to learn.
EN: The preposition 'in' followed by a gerund (verb-ing) is used to indicate the specific area or activity where an action or quality is applicable.
She has extensive experience in managing large teams.
EN: In many Western cultures, the pandemic sparked a significant public discourse on the balance between physical safety (quarantine) and mental well-being, leading to increased awareness and funding for mental health services.
EN: The phrase 'as a result of' is a compound preposition used to introduce the cause or reason for something. It is followed by a noun or noun phrase.
The flight was canceled as a result of heavy snow.
EN: The Oxford Comma (or serial comma) is the comma used after the penultimate item in a list of three or more items, before 'and' or 'or'. It helps clarify that the items are separate.
She bought apples, oranges, and bananas.
EN: The sentence reflects a global shift in mental health awareness post-COVID-19. In many Western cultures, discussing mental health struggles like 'loneliness' and 'anxiety' has become more normalized and less stigmatized due to the shared experience of the pandemic.
EN: The Noun Clause (that-clause) functions as the direct object of the verb 'emphasized'. It reports a fact or a statement that was highlighted.
The teacher emphasized that students must submit their assignments on time.
EN: The Comparative Structure 'more effective than' is used to compare two nouns (prevention and treatment) regarding their quality or impact.
Regular exercise is more effective than dieting alone for long-term health.
EN: The phrase 'prevention is better than cure' is a common English proverb. This sentence uses a more formal academic variation ('more effective than treatment') suitable for public health contexts.
EN: The use of 'invested heavily in' demonstrates a phrasal verb pattern where 'invest in' is modified by an adverb to show intensity. 'In' is the required preposition to indicate the destination of the investment.
The company invested heavily in renewable energy last year.
EN: The 'to + infinitive' phrase (to protect...) functions as an adverbial of purpose, explaining 'why' the governments took the action described in the main clause.
She studied hard to pass the entrance exam.
EN: The term 'contact tracing' became a globally recognized public health strategy during COVID-19, though its implementation varied significantly between Western countries (focusing on privacy) and some Asian countries (using more centralized digital data).
EN: Perfect Participle Phrase: The structure 'having + past participle' is used to indicate that the action in the participle phrase happened before the action of the main verb. It functions as an adverbial modifier explaining the reason or background.
Having finished the report, she turned off her computer.
EN: Passive Voice (Past Tense): The structure 'were + past participle' (were recognized) indicates that the subject receives the action rather than performing it. 'Widely' is an adverb placed between the auxiliary and the main verb for emphasis.
The new policy was widely supported by the local community.
EN: The term 'front lines' is a military metaphor commonly used in public health to describe healthcare workers who directly interact with patients during an outbreak, emphasizing their bravery and sacrifice.
EN: The structure 'remind someone of something' is used to cause someone to remember or think about a particular fact or situation.
The photograph reminded her of her childhood in the countryside.
EN: The gerund 'supporting' acts as the object of the preposition 'of', describing the specific nature of the 'importance'.
The importance of exercising regularly cannot be overstated.
EN: In many Western cultures, the pandemic led to a significant shift in public perception of healthcare workers, moving from seeing them as standard employees to 'frontline heroes.' This sentence reflects that societal shift in gratitude.
EN: Future Perfect Tense (will have + past participle): This tense is used to describe an action that will be completed by a specific point in the future. In this sentence, it suggests that by a future time, the process of shaping policy will be finished or established.
By next year, the government will have implemented the new health regulations.
EN: Reduced Relative Clause: The phrase 'learned from the COVID-19 pandemic' is a reduced relative clause modifying 'the lessons'. It is short for 'which were learned'.
The experience gained during the crisis is invaluable.
EN: The phrase 'for generations to come' is a common idiomatic expression in English used to emphasize the long-term impact of an event or policy, suggesting it will affect children, grandchildren, and beyond.
EN: Future Perfect Tense (will have + past participle): This tense is used to describe an action that will be completed before a specific point in time in the future.
By next month, I will have finished my research project.
EN: Time Clause with 'By the time': When using 'by the time' to refer to a future event, the verb in the dependent clause is usually in the Present Simple tense, while the main clause uses the Future Perfect.
By the time the movie starts, we will have bought our popcorn.
EN: In public health discourse, 'early warning systems' refer to the infrastructure and protocols used to detect disease outbreaks before they become pandemics. The sentence reflects a global shift toward proactive rather than reactive policy.
EN: Relative Clauses (Adjective Clauses): The word 'that' introduces a defining relative clause 'that experienced the pandemic firsthand' to identify which specific communities are being discussed.
Students that study consistently usually achieve better results.
EN: Gerunds after Prepositions: The word 'protecting' is a gerund (verb + -ing acting as a noun) because it follows the preposition 'in'.
She has a lot of experience in managing large teams.
EN: The term 'vulnerable populations' in a public health context typically refers to groups at higher risk, such as the elderly, immunocompromised individuals, or those with limited access to healthcare. 'Collective responsibility' reflects a shift from individualistic thinking to community-based action, which was a major theme during the global pandemic response.
EN: The sentence uses a 'Noun Clause' (that individual actions... as a whole) acting as the direct object of the verb 'taught'. It explains exactly what was taught.
The teacher told us that hard work leads to success.
EN: The phrase 'as a whole' is an idiom used after a noun to mean 'considered as a single unit' or 'altogether'.
The project was beneficial for the company as a whole.
EN: The sentence reflects a shift in Western societies towards 'collective responsibility,' a concept more traditionally associated with East Asian cultures, highlighting how the pandemic bridged some cultural gaps in public health thinking.
Key vocabulary words with IPA pronunciation, definitions, example sentences, and interactive quizzes.
Phrases with type tags, bilingual definitions, usage notes, and example sentences.
To fail to properly appreciate something because it is so common or familiar.
Faster than has ever been done before.
In the most important or dangerous position of an activity or conflict.
A situation where all members of a group are responsible for the actions and well-being of the group.
To think about or plan for the future.
A type of RNA that carries genetic information from DNA to the ribosome, where it serves as a template for protein synthesis.
Research studies performed in people that are aimed at evaluating a medical, surgical, or behavioral intervention.
The process of identifying, assessing, and managing people who have been exposed to a disease to prevent onward transmission.
Groups of people who are at higher risk for poor health or social outcomes due to various barriers or biological factors.
The physical space maintained between individuals to prevent the spread of an infectious disease.