I helped Tom buy 还是I helped Tom bought用合适的形式:I helped Tom ____(buy) a watch.那 did 后面的动词要改变原形吗?在过去式里有没什么句子前面动词要改变,后面动词也要改变?

分类: 作业答案 • 2022-02-16 10:23:09

问题描述：

I helped Tom buy 还是I helped Tom bought
用合适的形式:
I helped Tom ____(buy) a watch.
那 did 后面的动词要改变原形吗?
在过去式里有没什么句子前面动词要改变,后面动词也要改变?

答

本题答案I helped Tom buy a watch.
因为是help sb (to) do sth
"那 did 后面的动词要改变原形吗?"不懂你的意思

答

I helped Tom buy a watch. (原型)
She enjoyed the performance that was on yesterday.

答

help sb.do sth.
buy