"for+宾格+不定式”的用法
" for sb. to do sth.”在句中可做:主语、宾语、关系代词、形容词、副词。
这种for sb. to do sth.复合结构中的宾语是不定式动作的发出者，这种结构可以在句中担任:
POINT 1 作主语
例子：
It's dangerous for them to play in the street.
(作主语的不定式常用it来，动词不定式后置。
对于他们来说，在街道上玩是危险的。
It is hard for her to say good-bye.
对她来说.道声再见是很难的。
POINT 2 作宾语
例子：
They gave this work for Kevin to do.
他们把这项工作交给凯文做。
POINT 3 作关系代词
例子：
This is the only way for them to choose.
这是他们能选择的方法。
POINT 4 作形容词
例子：
This kind of music is for children to listen to.
这种音乐是给孩子们听的。
POINT 5 作副词
例子：
She opened the windows for the sunshine to come in
她打开窗户让阳光照进来。
容易犯错的句子:
1.你好不要去那里。
错：You'd better not to go there.
错：You had not better go there.
对：You'd better not go there.
had better是一个固定短语，后接原形动词，had better do sth.的意思是“好做某事，，，其否定句式是had better
not do sth.，not应放在better后，不可以说:had not better do sth.或had better not to
do sth.
2.让我们停下来休息一下吧。
错：Let's stop having a rest.
对：Let's stop to have a rest.
stop having a rest是“停止休息，，的意思，而stop to do sth.“停下正在做的
事而去做另一件事”，所以表示“停下来休息一会”应说:stop to have arest。试比较:
Stop talking, please.
请不要说话了。
He stopped to talk to her.
他停下来跟她谈话。
3.玛丽正忙于做作业。
错：Mary is busy to do her homework.
对：Mary is busy (in) doing her homework.
对：Mary is busy with her homework.
在英语中表示“忙于做某事”应说:be busy (in) doing sthobusy后不接动词不定式，跟名词或代词时，应说:be busy with sth。
4.老师叫他上学不要再迟到。
错：The teacher told him don't be late for school again.
对：The teacher told him not to be late for school again.
“叫某人做某事，，应说:tell sb to do sth，其否定形式是tell sb not to do sth.o不定式短语在句子中作宾语补语。
5.格林先生喜欢住在台湾。
错：Mr. Green enjoys to live in Taiwan.
对：Mr. Green enjoys living in Taiwan.
enjoy后可跟名词、代词或动名词作宾语，不能跟不定式。
6.汤姆在看他们打篮球。
错：Tom is watching them to play basketball.
对：Tom is watching them play basketball.
在动词watch, see带to。hear, let, make等后面跟不定式作宾语补语时.不定式不
7.我希望你能来。
错：I hope you to come.
对：I hope that you will come.
hope可以跟不定式或从句，但不能跟带不定式的复合结构。
8.他让我等了一周。
错：He kept me to wait for a week.
对：He kept me waiting for a week.
"keep+宾语”后跟动词时，一般应接现在分词作宾语补语，不跟动词不定式。又如:
Don't keep your mother waiting.
不要让你妈妈等了。
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