内容正文:
第08讲 动词不定式
掌握动词不定式构成及用法。
【典例】
考点1:动词不定式作主语
1.It’s important for us ________ a balanced diet which can help us keep fit.
A.not to have B.not having C.to have D.having
【答案】C
【详解】句意:对我们来说,有一个平衡的饮食是很重要的,它可以帮助我们保持健康。
考查非谓语动词。It is+形容词+for sb to do sth“对某人来说做某事是……的”,为it固定句型,故选C。
2.The elephant was too big. It was hard for people ________ it.
A.weigh B.weight C.to weigh D.weighing
【答案】C
【详解】句意:大象太大了。人们很难称它的重量。
考查非谓语动词。weigh动词,“称重量”;to weigh不定式形式;weighing现在分词形式;weight名词,“体重”;根据“It was hard for people...”可知考查“It is +形容词 for sb. to do sth.”,故选C。
考点2:动词不定式作宾语
1.—I’m sorry, Miss Green. I left my math book at home.
—It doesn’t matter. Please don’t forget ________ it here tomorrow.
A.taking B.to take C.bringing D.to bring
【答案】D
【详解】句意:——格林老师,我很抱歉。我把数学书落在家里了。——没关系。请别忘了明天把它带来。
考查非谓语动词和动词辨析。bring带来;take拿走。根据语境可知老师让学生把家里的书明天带来,应用bring,排除AB选项;forget to do sth忘记做某事(未做),forget doing sth忘记做某事(已做)。根据“Please don’t forget...it here tomorrow.”可知事情还未做,故选D。
2.James, I’m tired. Let’s stop ________ a rest.
A.having B.have C.to having D.to have
【答案】D
【详解】句意:詹姆斯,我累了。让我们停下来休息一下。
考查动词不定式的用法。stop to do sth.“停下来一件事去做另一件事情”,根据“James, I’m tired.”可知,我很累需要休息,是停下正在做的事情去休息。故选D。
3.He found ________ very difficult ________ great progress.
A.it’s; make B.that; to make C.it’s; making D.it; to make
【答案】D
【详解】句意:他发现取得很大的进步是很困难的。
考查代词及非谓语用法。本句考查句式:find it+adj.+to do sth.“发现做某事是怎么样的”,it作形式宾语,to do sth.作真正的宾语;可用宾语从句转化为find (that) it is+adj.+to do sth.,本句主句是一般过去时,从句is应改为was,选项中it’s=it is,排除A、C选项。故选D。
考点3:动词不定式作宾语补足语
1.To keep children away from danger, we warn parents ________ them at home alone.
A.leave B.to leave C.not leave D.not to leave
【答案】D
【详解】句意:为了让孩子远离危险,我们警告父母不要把他们单独留在家里。
考查非谓语动词。warn sb (not) to do sth“警告某人(不要)做某事”,为固定短语,根据语境可知不要把孩子单独留在家里。故选D。
2.It had rained for nearly two weeks by yesterday, and it made me ________ out these days, so I felt very bored.
A.don’t go B.didn’t go C.not to go D.not go
【答案】D
【详解】句意:到昨天为止,已经下了将近两个星期的雨了,这让我这些天都没有出去,所以我感到很无聊。
考查非谓语。make sb do sth“让某人做某事”,其否定形式为make sb not do st