He helps his mother do some cleaning in the afternoon.

He helps his mother do some cleaning in the afternoon.
为什么do不加es
liu8442489 1年前 已收到2个回答 举报

aa魚 幼苗

共回答了15个问题采纳率:73.3% 举报

help sb. do sth. help后面必须加动词原形,所以不能加es

1年前

2

hkdztd 幼苗

共回答了17个问题采纳率:76.5% 举报

因为谓语动词是help,由固定搭配help to do sth,所以不能用does

1年前

1
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