遇到do , don’t 动词还原 。
如:
1. He has lunch at home.
He doesn't have lunch at home.
Does he have lunch at home .
2. She sings well .
She doesn't sing well .
Does she sing well .
记住:
实义动词作谓语变
一般疑问句/否定句时,加
助动词do / does /did 和 don't / doesn't /didn't ,原来的动词都要还原。
即:
一般疑问句:Do / Does / Did +主语+动词原形+……?
否定句:主语+ don't / doesn't /didn't +动词原形+……。