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　　老师在下课前说：“不要忘记做家庭作业。”

　　“I\\\\\\\\\\\\\\\'m sorry. I forgot doing my homework. May I hand it in this afternoon，Mr. Chen？”said Li Ming.

　　李明说：“对不起，我忘记做家庭作业了。我今天下午交好吗，陈老师？”

　　4. 感官动词后接不带to的不定式或者现在分词的区别

　　例如：see sb. do sth.看见某人（经常）做某事 和see sb. doing sth.看见某人（正在）做某事

　　I often see him do exercise in the morning. 我经常在早晨看见他锻炼身体。

When I was walking in the park，I saw him drawing a picture there. 当我在公园散步的时候，我看见他正在那里画画。

　　5. 介词后面一般接动名词。同学们要特别注意介词to和不定式符号to的区别，例如下面的词组一定要记清： 

prefer doing sth. to doing sth. 喜欢做……不喜欢做…… 

look forward to doing sth. 期待/盼望做某事 

make a contribution to doing sth. 为……做出贡献 

　　6. 在主动语态中，感官动词（see，hear，feel，watch等）和使役动词（make，have，let等）要求接不带to的不定式做宾语补足语，而在被动语态里，不定式要带上to.

　　例如：The boss often made the workers work 10 hours a day.

　　The workers were made to work 10 hours a day.

She was heard to use strong language. 听说她骂人了。