动词不定式具有名词、形容词和副词的特征.因此在句中可以做主语、表语、宾语、宾语补足语、定语和状语.动词不定式作宾语 后面能接不定式作宾语的动词有：agree,ask,choose,decide,forget,hope,learn,want,wish,would like等.如：We hope to get there before dark.我们希望天黑以前到那儿.The girl decided to do it herself.那个姑娘决定自己做那件事.动词不定式作宾语的注意事项（2点）1、有些动词既可跟不定式作宾语,也可跟动名词作宾语,但含义不同：remember to do 记住要做某事；remember doing 记得曾经做过某事forget to do忘记要做某事 forget doing 忘记曾经做过某事stop to do 停下来去做某事 stop doing 停止做某事go on to do 继续做另一件事 go on doing 继续做原来在做的事I remember seeing you somewhere before.我记得以前在哪儿见过你.Please remember to turn off the light when you leave.离开时请记得关好灯.2、不定式作宾语时,如带有宾语补足语,则要把不定式放到后面,用it作形式宾语,构成“主语+动词+it+宾补（形容词、名词）+不定式”结构.如：He found it very difficult to get to sleep.他发现很难入睡.动词不定式作宾语补足语 1、后面能接to不定式作宾语补足语的动词有：ask,order,teach,tell,want,wish,help等.The teacher told us to do Exercise 1.老师要我们做练习一.I want both of you to go.我要你们俩去.We helped her (to) repair her bike.我们帮助她修理自行车.2．使役动词let,have,make及感官动词see,watch,notice,hear,feel等要以不带to的不定式作宾补.Let’s have a rest.我们休息一会吧.I saw him come in.我看见他进来了.感官动词后既可跟不带to的不定式作宾补,也可跟v-ing作宾补,前者表示动作的全部过程已结束；后者表示动作正在进行.I saw him come downstairs.我看见他下了楼.（说明他下楼了这件事）I saw him coming downstairs.我看见他在下楼.（说明他下楼时的情景）动词不定式的否定形式 动词不定式的否定式是在to前加not；不带to的不定式则在动词前加not.如：Zhang Ming asked me not to stay at home all day.张明要我不要整天呆在家里.My mother let me not do it by myself.妈妈让我不要独自做这件事.回答者：想念n1的味道 - 一级 2009-8-31 16:50英语中,把“to do(动词原形)”结构叫做动词不定式.其中to作为小品词用,是动词不定式的标志.但在下列情况下,小品词to会被省略掉.1、在情态动词及助动词后的不定式不带to.例如：I can do it myself.我自己干得了.Will you please close the window?请你关上窗户,好吗?He didn’t go home last night.昨晚,他没有回家.2、在see,watch,notice,look at,listen to,hear,feel等感官动词的后面作宾语补足语时.例如：Did you see him come out of the hotel just now?你刚才看见他从旅馆出来了吗?I heard her lock the door.我听见她锁了门.但是,上述情况只是出现在主动句中,在被动句中必须带上to.例如：He was noticed to enter the office.有人看见他进了办公室.3、在 make,let,have等使役动词之后作宾语补足语时.例如：She lets us meet her at the bus station.她要我们去汽车车站接她.Don’t make the students do so much homework..别让学生做那么多的作业.与感官动词一样,在被动句中的使役动词必须和带to的不定式连用.例如：I was made to try it again.有人要我再试一次.4、在help后作宾语补足语用的不定式前的小品词to,可带,也可不带.例如：She helped her mother（to）clean the house yesterday afternoon.昨天下午,她帮助她母亲打扫屋子.5、had better后的不定式符号to要省略.例如：We had better start now.我们最好立即动身.You had better not talk in class.你最好别在课堂上说话.6、would rather/sooner,rather/sooner than 后的不定式符号to要省略.例如：We would rather/sooner stay at home.我们宁可呆在家里.He prefers to drink some water rather/sooner than drink a coffee.他宁可喝些水,也不愿喝一杯咖啡.7、“Why not ”结构中,紧随其后的动词不定式不带to.例如：Why not ask the man over there?为什么不那边的这个人?8、当两个或两个以上的不定式连在一起时,只须在第一个不定式前加to,后面的不定式通常省略to.例如：I want you to stand beside me and hold the stick.我想要你站在我身边扶住这根棍子.He told me to finish my homework and（to）hand it in.他告诉我完成作业并把它交上去.9、but 和 except跟在“do + anything/nothing/everything”后面时,通常与不带to的不定式连用.例如：I could do nothing but lie down.我别无选择,只能躺下.My pet dog does everything except speak.我的宠物狗除了不能说话以外,什么事都会做.