1、单元语法聚焦五动词不定式动词不定式的基本形式是“to动词原形”，其否定形式是“not to动词原形”。动词不定式没有人称和数的变化，在句中除了不能作谓语外，可以充当主语、宾语、宾语补足语、定语、状语等句子成分。1作主语不定式短语作主语时，常用it 作形式主语，而将真正的主语置于系表结构之后，即“It is形容词/副词不定式”。如：It is not easy to keep milk fresh in such hot days.在如此炎热的天气，保持牛奶新鲜是不容易的。2作宾语常跟不定式作宾语的动词有want, promise, try, agree, decide, hope, expec
2、t, plan, wait 等。如：I want to be a teacher in the future.将来我想成为一名教师。3作宾语补足语常跟不定式作宾语补足语的动词有tell, want, ask, advise, expect等。但在感官动词(如 see, watch, hear, feel 等)和使役动词(如have, make, let等)后要接不带to的动词不定式作宾语补足语。如：I want her to come here right now.我想让她立刻来这里。Did you see him go out？你看见他出去了吗？4作定语不定式作定语时，常置于被修饰的名词或代
3、词之后。如：I have a lot of homework to do.我有许多作业要做。5作状语不定式作状语时，可表示目的、原因、结果等。如：I will go to the station to meet my uncle.我将去车站接我叔叔。()1.My parents always tell me _ more vegetables and fruit.Aeat Beating Cto eat()2.What would you like _ for your mom on Mothers Day?A dress.Abuy Bbuying Cto buy()3.Well do wha
4、t we can _ the sick man.Ato help Bhelp Chelps()4.Many children are left alone in the countryside. Lets try our best _ them.Ahelp Bhelping Cto help()5.2019天水Sleeping is a popular way _ among students. Arelax Brelaxed Crelaxing Dto relax()6.Jessicas parents always encourage her _ out her opinions.Aspe
5、ak Bspeaking Cto speak()7.2019天津 We only planned _ the play for an hour, but in the end, we stayed for three hours. Awatch Bwatches Cto watch Dwatched ()8.2019益阳 Its necessary for you _ the classroom clean, class. Akeep Bkeeping Cto keep ()9.What are you going to do when you grow up?A singer, but my
6、 parents want me _ a teacher.Abe Bto be Cwill be()10.Ill have a tenday holiday. But I dont know _How about Paris?Awhat to do Bwhere to go Cwhen to go()11.He promised _ his old friend during his stay in Tianjin.Asee Bseeing Cto see()12.At times, parents find it difficult _ with their teenage children.Atalk Bto talk Ctalking详解详析1C2.C3A句意： 我们将会尽我们所能来帮助这名生病的男子。此处为动词不定式作目的状语。4C5D句意：在学生中，睡觉是一个流行的放松方式。此处是动词不定式作后置定语。 6C7C句意：我们仅计划观看一个小时的戏剧，但最后，我们在那儿待了三个小时。 plan to do sth.意为“计划做某事”。 8C句意：同学们，对你们来说保持教室的整洁是很有必要的。“Itsadj.for sb. to do sth.”意为“对于某人来说做某事是的”。 9B10.B11.C12.B第 3 页