Question Formation — Do/Does/Did
English questions need auxiliary verbs that Japanese doesn't have
Category: Questions
The Rule
English yes/no questions require 'do/does/did' + subject + base verb: 'Do you like coffee?' NOT 'You like coffee?' (which is only a confirmation question with rising intonation).
Why This Matters
Japanese forms questions by adding か (ka) to the end of a statement: コーヒーが好きですか？ English can't just add a question mark — it must restructure the sentence with an auxiliary verb. Japanese speakers frequently produce 'You like coffee?' which sounds like a surprised confirmation, not a genuine question.
Examples
• Do you speak English? — "英語を話しますか？" [Do + you + base verb — auxiliary 'do' is required] • Does she like pizza? — "彼女はピザが好きですか？" ['Does' for he/she/it + base verb (not 'likes')] • Did you go yesterday? — "昨日行きましたか？" ['Did' for past + base verb (not 'went')]
Common Mistakes
❌ You speak English? ✅ Do you speak English? → Without 'do', this sounds like a surprised statement, not a proper question. ❌ Does she likes pizza? ✅ Does she like pizza? → After 'does', use base form 'like', NOT 'likes'. The 's' is already in 'does'.
Quick Tip
Three-step question formula: (1) Choose do/does/did. (2) Put subject after it. (3) Use BASE form of main verb (no -s, no -ed). Do + you + like? Did + she + go?
Three-step question formula: (1) Choose do/does/did. (2) Put subject after it. (3) Use BASE form of main verb (no -s, no -ed). Do + you + like? Did + she + go?
Examples
Common Mistakes
Incorrect: You speak English? → Correct: Do you speak English?. Without 'do', this sounds like a surprised statement, not a proper question.
Incorrect: Does she likes pizza? → Correct: Does she like pizza?. After 'does', use base form 'like', NOT 'likes'. The 's' is already in 'does'.
Quiz
Which is a properly formed question?