被动语态还原to的口诀

被动语态还原to的口诀：一感二听三让四看半帮助。这些词包括feel，hear，listen to，make，have，let，see，watch，look at，observe，notice，help等。

被动语态中to的还原

不带to的动词不定式作宾语补足语的主动语态改为被动语态时，省略的to要加上。

常考的动词有make，let，have，see，watch，notice，hear等。

例如：

1.They heard the children sing that morning.

→The children were heard to sing that morning.

2.The teacher made the little boy stand in the classroom.

→The little was made to stand in the classroom by the teacher.

3.We saw them play football just now.

→They were seen to play football just now.

4.We often hear her sing in English.

→She is often heard to sing in English.

一感二听三让四看半帮助

一感:feel

二听:hear，listen to

三让:make，have，let

五看:see，watch，look at，observe，notice

半帮助:help(指其后的不定式可带可不带to)

这些动词后,如跟不定式作宾补,则在主动语态中，不定式不带to,但在被动语态中要带to,如:

He felt something move beside him...

他感觉身边有什么东西在动.

I heard the girl sing an English song.

He often makes his sister cry.

His sister is often made to cry.

Have you seen a young man pass by

Mother watched her son play in the park.

Can you help me (to) carry the box?

Let me have a try.

Please listen to the man tell the story.