非谓语动词做表语
2.Themostimportant thing is to put the oryintopractice.最重要的是要把理论应用到实践。3.Our aim is to help them，not to teachthemalesson.我们的目的是帮助他们，而不是教训他们。总结：不定式做表语表示主语的具体内容，如例1；表示将来的动作，如例2；表示目的，如例3。因此，在表示“目的，愿望，梦想，需求”等名词做主语时其表语应该用不定式.4.Whathedidwas___(wait)答案：wait或是towait分析：当主语部分含do这个实义词，表语所说的是do的具体内容，这时表语部分的动词用todo或do的形式。例如：Allthathe could do was(to) comfort her.他所能做的一切就是安慰她。
动名词做表语
1.My job is teaching.(Teaching is my job.)2.Seeingisbelieving.百闻不如一见。总结：动名词做表语，表示抽象概念。动名词做表语一般用来表示“身份，职业”等.大部分时候主语与表语可以互换，如例1。此外，还要注意主语与表语的一致性，如例2。例2还可以说成：Toseeistobelieve.[比较]一般来说，表示比较抽象的一般行为时多用动名词做表语;表示具体某次动作，特别是将来的动作时，多用不定式.例如：Theirjobis building houses.他们的工作是盖房子.Our task now is to developoureconomy.我们的任务是发展经济.有时两者都可以用，没有什么差别.例如：What she likes iswatchingthe children play.(=What she likes is to watch thechildrenplay.)她喜欢的是看孩子们玩.
分词做表语
首先做一些练习1.The situation is____(encourage).2.Thedoorremained____(lock)when he cameagain.答案：1.encouraging2.locked总结：surprise，interest，excite，puzzle，disappoint，astonish，encourage，inspire，shock，move等及物动词用做表语时，要看其与主语的关系。如果与主语为主动关系，则用-ing形式，表示主语的特征。如果是被动关系，用-done这种形式，表示主语的状态。如：Thenewsastonishedus.这句话就表明了thenews与astonish为主动关系。astonish与us为被动关系。那么就可以直接得出以下两个句子：1)Thenews wasastonishing.2)We were astonished(by thenews).练习：3.Shelooked_____(disappoint).4.The newsisquite___(astonish).答案：3.disappointed4.astonishing有时候动词的过去分词作用在be动词之后，并非是被动语态，而是做表语表示事物存在的状态。如：5.Thebottlesare broken.杯子都破了。选择最佳答案：1The speech was so _____that theywereall____.A.inspiring;exciting B.inspiring;excitedC.inspired;exciteD.inspired;exciting2.Her wish is ___anengineer.A.becoming B.becomeC.to become D.being come3.Somepeoples greatest pleasureis______.A.fishing B.to fish C.to befishing D.being fish4.Thereport was so____that they wereall_____.A.inspiring，excitingB.inspiring，excitedC.inspired，excited D.inspired，exciting5.--“Youlook pale.”--“I feela little______.”A.tire B.tired C.tiringD.tiresome6.As we joinedthe big crowd I got_____________ from myfriends.A.seted B.sparedC.lost D.missed7.Her son，to whom she wasso_____，went abroad tenyears ago.A.loved B.cared C.devotedD.affected8.It is believed thatif a book is_______，it willsurely_________thereaders.A.interested;interestB.interesting;beinterestedC.interested;beinterestingD.interesting;interest9.Fromhis_____expression，we could see hewas_____.A.puzzled;puzzlingB.puzzled;puzzled C.puzzling;puzzlingD.puzzling;puzzled10.AllthatI did all the morning was_____themeal.A.prepare B.preparingC.prepared D.to have prepared
Keys：
BCABBACDBA （编辑：赵露）