含有动词不定式的复合宾语
动词不定式可用作复合宾语中的宾浯补足语.可有这种复合宾语结构的动词有get(请),ask(请求),order(命令),persuade(说服),advise(劝告),like(喜欢),want(想要),tell(叫),know(知道)help(帮助),call on(号召,请求),等等.如：
He got someone to repair the door.他请人修理门.
I persuaded my brother to change his mind.我说服我弟弟改变了主意.
The doctor advised him to take a good rest.大夫劝他好好休息.
在某些及物动词的复合宾语中,动词不定式须省掉to这些动词有
make(使),let(让),see(见),
watch(望),hear(听),have(使),feel(觉得)等.动词help后不定式的to可以省掉,也可以保留.如：
Make the past serve the present and foreign things serve China.古为今用,洋为中用.
He let me go home.他让我回家.
We must have someone repair the refrigerator.我们必须叫人来修电冰箱.
I heard him speak in the next room.我听到池在隔壁房间里讲话.
Mother is helping pat (to) clean her shoes.妈妈正帮蓓蒂刷鞋子.
[注一]上述句子变成被动语态时,动词不定式的to仍须保留
ask sb to do sth 要求某人做某事
promise sb to do sth答应某人做某事
advise sb to do sth 建议某人做某事
tell sb to do sth 告诉某人做某事