Negative Sentences — Don't/Doesn't/Didn't
English negation requires auxiliary verbs, not just adding 'not'
Category: Negation
The Rule
English negation: subject + do/does/did + not + base verb. 'I don't like it.' NOT 'I not like it.' With be/have/modals, add 'not' directly: 'I am not', 'I can not'.
Why This Matters
Japanese negation modifies the verb ending: 好きじゃない (not like), 行かない (don't go). English requires inserting an auxiliary. Japanese speakers often produce 'I not go' or 'I no like' by translating directly.
Examples
• I don't understand. — "わかりません。" [don't + base verb — NOT 'I not understand'] • She doesn't eat meat. — "彼女は肉を食べません。" ['doesn't' for he/she/it + base form] • We didn't go yesterday. — "昨日行きませんでした。" ['didn't' + base form (go, not went)]
Common Mistakes
❌ I not like coffee. ✅ I don't like coffee. → English requires 'do not / don't' before the verb. You can't just add 'not'. ❌ She doesn't likes pizza. ✅ She doesn't like pizza. → After 'doesn't', use base form. The third-person marker is already in 'doesn't'.
Quick Tip
Same rule as questions: do/does/did absorbs the tense, so the main verb stays in base form. 'She doesn't LIKE' not 'She doesn't LIKES'.
Same rule as questions: do/does/did absorbs the tense, so the main verb stays in base form. 'She doesn't LIKE' not 'She doesn't LIKES'.
Examples
Common Mistakes
Incorrect: I not like coffee. → Correct: I don't like coffee.. English requires 'do not / don't' before the verb. You can't just add 'not'.
Incorrect: She doesn't likes pizza. → Correct: She doesn't like pizza.. After 'doesn't', use base form. The third-person marker is already in 'doesn't'.
Quiz
Which is correct?