英语不带to的不定式详解.

英语不带to的不定式：
1.使役动词 let,have,make 等后接不定式作宾语补语时,作宾语补语的不定式不带to.如：Let me sit down!让我坐下!(不能用:to sit down).再如:His mother often makes him do housework.他妈妈经常让他做家务事.(不能用:to do housework).
2.感官动词 see,notice,watch,look at,hear,listen to,feel 等后作宾语补语的不定式不带to.如：He saw the man walk into the room.他看见这个人走进了房间.(不能用:to walk into the room) .
但是应该注意的是：如果上述句子变成被动语态的句子,就一定要加上 to,例如：His mother often makes him do housework.他妈妈经常让他做家务事,如果变成被动句,就是：He is often made to do housework (by his mother).再如:He saw the man walk into the room.他看见这个人走进了房间,如果变成被动句,就是：The man was seen to walk into the room (by him).(当然这2句被动语态句子括号中的:by his mother 及by him 都可以省略,因为被动语态不强调动作的执行者,但是:to do housework 及 to walk into the room 中的 to 却千万不能省略).