Present tense: do / does(he/she/it)
Past tense: did
Negatives: don't / doesn't, didn't
2014년 7월 30일
0
2
0
Do (present) I do study Chinese.
Didn't/did (Past) I didn't eat it. I did eat it.
Does/doesn't (He/she with present) He does eat apples. He doesn't eat apples.