不带to的不定式如下：

1、在感官动词see,hear,watch,notice,feel,look at,listen to等及使役动词make,let,have等后作宾语补足语的动词不定式要省略to.如：We saw him get on a bus.The boss often made the workers work for over 12 hours a day.

注意：以上情况如果用于被动语态时,不定式符号to一定要补回.如：He was seen to get on a bus.The workers were often made to work over 12 hours a day.

2、在动词help后作宾语补足语的动词不定式符号to可带可不带.如：I often help my mother (to) do housework.

3、在had better,would rather后动词不定式不能带to.如：You’d better not go out at night.The boy would rather stay at home by himself.

4、当两个或两个以上的动词不定式并列使用时,通常只有第一个不定式前带to,第二个及以后的不定式可省略to.如：I want to have a read and write.He wants to have a rest and have a cup of tea.

5、“Will(Would) you please＋不带to的不定式”.如：Would you please not do that again?

6、当不定式作介词but,except的宾语,表示“除了……不/没有做……”时,不定式要省略to.如：She does nothing but watch TV.She doesn’t want to do anything except sleep.

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