摘要:2.动词不定式不带to的情况. ①在动词make, have, let ,hear, listen to, feel, see, watch, look at, notice, observe,等后面作宾语补足语时.动词不定式不带to.如: I feel my heart beat fast. Nobody saw him come in. Look at the horse run. 当这些动词在被动句中作谓语时.后面的动词不定式就必须带to. 如:They were heard to sing a song. He was made to work from morning till night. 在动词help后面按带to 与不带to 的含义有所不同. His advice will help you to improve your English. 他的忠告有助于你提高英语水平.(advice 不参与到improve的活动中). His book will help you improve your English. 他的书有助于你提高英语水平.(book 参与到improve 的活动中). ②在某些固定词组: had rather 宁可.had better 最好.had best 最好.would rather- than-宁愿-而不愿 would sooner-than-宁愿-而不愿.mayas well 还是-的好.等结构都需要接不带to的不定式.如: Hadn’t you better take an umbrella? I’d rather stop now. I’d best leave now, or I’ll be late. ③在介词but, except, besides, than, save等前若有实义动词do时.常用无to的不定式作其介词的宾语:例如: What do you like to do besides swim? 除了游泳.你还爱好什么? He did nothing else than laugh. 他只是笑笑而已. ④表示“只好 的but之后也需接不带to的不定式.它们是:cannot but, cannot help but, could not but, could not help but, cannot choose but,等. We could not but weep at our bad luck. 对于我们的厄运我们只有哭了. It’s raining hard. I cannot help but stay at home. 天在下大雨.我只好留在家里. ⑤know的现在完成体的否定式.后面一般接不带to的不定式.如: I have never known him come late. 我从来不知道他迟到过. ⑥并列连词连接不定式时.第一个不定式带to.第二个不定式to 可以省掉. I haven’t decided whether to go or stay longer.

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