爱华网“forget to do sth。”表示将来不要忘记做某事，谈的是未来的事情;“forget doing sth。”表示忘记过去应该做的事情。
例如： “Don’tforget to do your homework。” said the teacher beforethe class was over.
老师在下课前说：“不要忘记做家庭作业。”
“I’m sorry. Iforgot 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?”
2.stop to do sth. 和stop doing sth.“stop to do sth。” 表示停止做其它事情而去做“to do sth。”所表示的事情，可以将“to do sth。”理解成“stop”的目的状语;“stop doing sth。”表示不做“doing sth。”所表示的事情。
例如： “Stop talking. Let’s begin our class。” said the teacher. 老师说：“别说话了，让我们开始上课。”
We have kept doing our homework for along time. Let’s stop to listen to music. 我们做家庭作业很长时间了，让我们停下来听听音乐。
3.havesth. done。(过去分词)(让别人)做某事例如：I had my hair cut yesterdayafternoon. 我昨天下午理了发。
My computer can not work now. I musthave it repaired. 我的电脑有故障了，我必须让人修好它。
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 themorning. 我经常在早晨看见他锻炼身体。
When I was walking in the park, I sawhim 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. 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 workerswork 10 hours a day.
The workers were made to work 10 hoursa day.
She was heard to use strong language. 听说她骂人了。
6.常用的几个和不定式有关的句型：
Why not do sth? 为什么不做某事?
It takes/took sb. some time to do sth.做某事花了某人多长时间。
It is/was +形容词+(forsb。) +to do sth. 做某事(对某人来说)怎么样。
7. 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
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8. 现在分词和过去分词做定语的区别A. 现在分词含有正在进行的意思，而过去分词含有被动或者已经完成的意思，如：
a developing country 发展中国家 a developed country 发达国家
boiling water 正在沸腾的水(一般情况下水温为100℃)boiled water 开水(已经烧开的水，水温可以依然很高，也可以是凉白开)
a boy named Jim 一个叫Jim的男孩
B. 有些动词的现在分词和过去分词都具有形容词特征，但是它们的意思有区别。它们的-ing形式往往用来说明事物的特征;他们的-ed形式表示被动的意思，用来说明人的情况。
I am interested in this interestingstory. 我对这个有趣的故事感兴趣。
I am moved at the moving sight. 我被这动人的情景感动了。
They were amazed at the amazing facts. 他们对那些令人惊异的事实感到惊奇。
下面是一些常见的固定表达，请同学们牢记：和to do 连用的固定搭配
ask sb. to do sth. 请求某人做某事
be pleased /be glad to do sth。很高兴做某事
can't wait to do sth. 迫不及待地做某事
can't afford to do sth. 不能担负起干某事
decide to do sth. 决定做某事
do/try one's best to do sth。尽全力做某事
do nothing to do sth. 对……无能为力
deserve to do sth. 值得干某事
形容词/副词+enoughto do sth. 足以做某事
encourage sb. to do sth. 鼓励某人做某事
find + it + 形容词 +to do sth. 发现做某事……
get ready to do sth. 准备做某事
go on to do sth. 继续做某事
hope to do sth. 希望做某事
improve sth. to do sth. 改善/提高某物来干某事
invite sb. to do sth. 邀请某人干某事
It's better to do sth. 干某事比较好
It's time to do sth. 到该做某事的时间了。
like to do sth. 喜欢做某事……
like sb. to do sth. 喜欢某人做某事
love to do sth. 爱做某事
learn to do sth. 学会做某事
make one's mind to do sth. 下决心做某事
make a list of five ways to do sth. 列出干某事的五种方式的清单
need to do sth. 需要做某事
plan to do sth. 计划干某事
prefer to do sth.+ rather than do sth.喜欢……不喜欢……
refuse to do sth. 拒绝干某事
remember to do 记得要去做某事
The best time to do sth. is… 干某事的最佳时间是……
stop to do sth. 停下来去做另一件事
start/begin to do sth. 开始做某事
seem to do sth. 似乎要做某事
set one's mind to do sth. 一心要做某事
tell sb. to do sth. 告诉某人做某事
too…to do sth.太……以致于不能……
try to do sth. 努力/试着去做……
think it nessary for sb. to do sth. 认为某人有必要干某事
There's no time to do sth. 没时间做某事
teach sb. (how) to do sth. 教某人干某事
used to do sth. 过去常常干某事 wish sb. to do sth. 希望某人做某事
would love to do sth. 很愿意做某事
would like (sb。) to do sth. 想让某人做某事
want to do sth. 想做某事
和doing 连用的固定搭配
watch sb. doing sth. 观看某人正在做……
stop doing sth. 停止做某事
remember doing sth. 记得已做过某事
try doing sth. 努力/试着去做……
like doing sth. 喜欢做某事
forget doing sth. 忘记已做过某事
go on doing sth. 继续做某事
be busy doing sth. 忙于做某事
be worth doing sth. 某事值得一做
carry on doing sth. 继续做某事
couldn't help doing sth. 忍不住做某事
