做表语用的非谓语动词有：不定式(todo)，动名词(doing)，和词性标注(done，doing)
■不定式做表语
1.Her wish was to become an artist.她的心愿是变成一位艺术大师。
2.The most important thing is to put the ory into practice.最重要的是要把基础理论运用到实践活动。
3.Our aim is to help them，not to teach them a lesson.大家的目地是协助她们，而不是经验教训她们。
汇总：不定式做表语表明主语的主要内容，如例1；表明未来的姿势，如例2；表明目地，如例3。因而，在表明“目地，心愿，理想，要求”等专有名词做主语时其表语应当用不定式.
4.What he did was___(wait)回答：wait或者to wait
剖析：当主语一部分含do这一实义词，表语常说的是do的主要内容，这时候表语一部分的形容词用todo或do的方式。
比如：All that he could do was(to) comfort her.他能够做的一切便是宽慰她。
■动名词做表语
1.My job is teaching.(Teaching is my job.)
2.Seeing is believing.百闻不如一见。
汇总：动名词做表语，表明抽象化。动名词做表语一般用于表明“真实身份，岗位”等.绝大多数情况下主语与表语能够交换，如例1。除此之外，也要留意主语与表语的一致性，如例2。例2还能够称作：To see is to believe.
[较为]一般来说，表明较为抽象性的一般个人行为时要用动名词做表语;表明实际一次姿势，尤其是未来的姿势时，要用不定式.
比如：Their job is building houses.她们的工作中是建房子.
Our task now is to develop our economy.大家的每日任务是发展经济.
有时候两者都可以用，没什么区别.
比如：What she likes is watching the children play.(=What she likes is to watch the children play.)她喜欢的是看小朋友们玩.
■词性标注做表语
*做一些训练
1.The situation is____(encourage).
2.The door remained____(lock)when he came again.
回答：1.encouraging 2.locked
汇总：surprise，interest，excite，puzzle，disappoint，astonish，encourage，inspire，shock，move等及物动词用作表语时，需看其与主语的关联。假如与主语为积极关联，则用-ing形式，表明主语的特点。如果是处于被动关联，用-done这类方式，表明主语的情况。
如：The news astonished us.这句话就说明了the news与astonish为积极关联。astonish与us为处于被动关联。那麼就可以立即得到下列2个语句：
1)The news was astonishing.
2)We were astonished(by the news).
训练：
3.She looked_____(disappoint).
4.The news is quite___(astonish).
回答：3.disappointed 4.astonishing
有时形容词的过去分词功效在be动词以后，并不是是被动语态，只是做表语表明事情存有的情况。如：
5.The bottles are broken.水杯都破了。
挑选正确答案：
1The speech was so _____that they were all____.
A.inspiring;exciting B.inspiring;excited C.inspired;excite D.inspired;exciting
2.Her wish is ___an engineer.
A.becoming B.become C.to become D.being come
3.Some people's greatest pleasure is______.
A.fishing B.to fish C.to be fishing D.being fish
4.The report was so____that they were all_____.
A.inspiring，exciting B.inspiring，excited C.inspired，excited D.inspired，exciting
5.--“You look pale.”--“I feel a little______.”
A.tire B.tired C.tiring D.tiresome
6.As we joined the big crowd I got_____________ from my friends.
A.separated B.spared C.lost D.missed
7.Her son，to whom she was so_____，went abroad ten years ago.
A.loved B.cared C.devoted D.affected
8.It is believed that if a book is_______，it will surely_________the readers.
A.interested;interest B.interesting;beinterested C.interested;beinteresting D.interesting;interest
9.From his_____expression，we could see he was_____.
A.puzzled;puzzling B.puzzled;puzzled C.puzzling;puzzling D.puzzling;puzzled
10.Allthat I did all the morning was_____the meal.
A.prepare B.preparing C.prepared D.to have prepared
Keys：
BCABBACDBA
