不定式的构成非常简单,是to+动词原形。to有时也可以不带。动词不定式没有人称和数的变化,可以担当除谓语外的任何句子成分。什么时候可以不带to
不定式省to有四种情况:
使役动词 let,have,make 等后接不定式。如:Let him go! 让他走!
would rather,had better后。如:You had better stay at home.你最好呆在家里。
Why... / why not...后。如:Why not have a good rest on Sunday? 为什么星期天不好好休息一下呢?
感官动词 see, watch, look at, hear, listen to, smell,feel, find 等后作宾补,省to。如:I saw him dance. 我看见他跳舞。
注意:这些情况在被动句中可千万不可省to 哟! 如:The boss made them work the whole night. 变成被动句:They were made to work the whole night.
不定式的特殊用法:
It与不定式:动词不定式可以做主语,但如果动词不定式太长,显得头重脚轻的,那么我们就可用形式主语it代替,而把真正主语(即不定式)放于句尾。
如: It is not difficult for me to study English well.(对我来说学好英语是可能的。)
不定式还可以充当句子的宾语,但有些动词,如find,think,believe 等,在语法上不能接受不定式作宾语,只有用it作形式宾语,从而把动词不定式置于句尾。这样的不定式可继续充当其宾语的作用。
如: I found it difficult to fall asleep.我发现很难入睡。
还有一点:动词不定式,还可用在how,when,where,what,which 等疑问代词或副词之后,与其共同作宾语。如:I don't know how to use a computer.我不知道怎样使用电脑。
too...to...和enough...to:too...to表达"太 ... 一致于不能..."。
enough ... to 表达 "足以..."。这两个词组的用法用两个例子就可以说清楚了。
国内英语资讯:Chinese-produced documentary to be aired in Cambodia
国内英语资讯:China allocates 140 bln yuan to help needy groups
人民币贬值能缓解贸易战冲击,但也有代价
国内英语资讯:CPC central committee holds symposium on economic work
英国向其他西方国家靠拢,加强监管中资收购
体坛英语资讯:Organizers: No new venues for Beijing 2022 newly added seven events
体坛英语资讯:Russia wins two golds on 2nd day of junior artistic swimming worlds
The Story of Love 爱的故事
如何保存和清洗胸罩?看看最常犯的三个错误
国内英语资讯:China to accelerate launch of one-stop govt service platform
梅根第一个王室生日怎么过?
国际英语资讯:25 still missing after Greeces deadly wildfire in coastal resort
世界大变革中的中美关系
国内英语资讯:China launches new twin BeiDou-3 navigation satellites
美国逮捕一名参与偷渡也门人的约旦公民
体坛英语资讯:Chinese shot putter Gong crowned at IAAF Diamond League Monaco meeting
美国马里兰报社枪杀案嫌疑人不认罪
国内英语资讯:Xinhua discusses media innovation cooperation with Israel
A Letter 一封信
国内英语资讯:Xi requires resolute ending of militarys paid services
没有努力的动力,应该怎么办
Family Rules 家风家训
国际英语资讯:Moroccos king stresses to safeguard homeland
国内英语资讯:Senior Chinese official meets British foreign secretary
国际英语资讯:Nigerias Senate leader leaves national governing party
国内英语资讯:Chinese-made hybrid vehicle joins bus fleet in Uruguay
国际英语资讯:Yemens Houthi rebels offer unilateral initiative to stop war in Red Sea
国内英语资讯:Malaysia continues to see China as good friend, partner: PM Mahathir
国际英语资讯:Aeromexico plane crashes in north-central Mexico with no fatalities
国际英语资讯:Russia, Turkey, Iran seek quick start of work at Syrian constitutional committee