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Don't Be Too Casual in Emails to Teachers: Overly Informal Words Learners Most Frequently Misuse

Textbooks often teach just one word for a single concept, but spoken and formal English are actually two different versions. When writing emails, interviewing, or messaging teachers, many learners easily bring overly casual words like wanna, gonna, ASAP, and guy into formal settings, making them sound inappropriate. This article uses a "✗ Chinglish → ✓ Authentic Expressions" approach to help you adjust your level of formality, useful for both professional and academic success.