1） 动名词与不定式的区别：
动名词表达的是：状态,性质,心境,抽象,经常性,已发生的
不定式表达的是：目的,结果,原因,具体,一次性,将发生的
2） 接不定式或动名词,意义相同.
3)在下列情况下,一般要用不定式：
①hate,like,love前有would(should)时,如：I'd like to have a cup of coffee.
②当谓语动词begin,continue,start等是进行式时,如：Thestudents are starting to work on the di fficult maths problem.
③begin,continue,start与know,understand等状态动词连用时,如：I soon began to understand what was happening.
⒋advise,allow,encourage,forbid,permit等动词后接动名词作宾语,或带不定式作宾语补足语.如：
Our teachers don't permit our swimming in the lake.
Our teachers don't permit us to swim in the lake.
4） 部分动词后接不定式或动名词时,意义差别较大,应根据句子语境选择使用.
①forget,remember,regret后接不定式,表示现在或未来的动作,接动名词表示动作已经发生.如：
Don't forget fo post the letter for me.
Have you forgotten meeting her in Beijing Airport?
Remember to close the windows before you leave.
I remember writing him a letter a year ago.
We regret to tell you that all of you are not invited toattend the meeting.
They regretted ordering these books from abroad.
动名词与不定式语义不同的有11 组：
1 stop to do stop doing
2 forget to do forget doing
3 remember to do remember doing
4 regret to do regret doing
5 cease to do cease doing
6 try to do try doing
7 go on to do go on doing
8 afraid to do afraid doing
9 interested to do interested doing
10 mean to do mean doing
11 begin/ start to do begin/ start doing
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