状态系动词持续系动词表像系动词感官系动词
连系动词也称系动词，它本身有词义，但不能单独用作谓语，后边必须跟表语，构成系表结构，说明主语的状况、性质、特征等情况。
1.状态系动词
用来表示主语状态，只有be一词。
He is a teacher.他是一名教师。
is与补足语一起说明主语的身份。
2.持续系动词
用来表示主语继续或保持一种状况或态度，主要有keep, rest, remain, stay, lie, stand等。
He always keeps silent at meeting. 开会时他总是保持沉默。
This matter rests a mystery. 此事仍是一个谜。
3.表像系动词用来表示"看起来像"这一概念，主要有seem, appear, look等。
He looks tired. 他看起来很累。
She seems (to be) very sad.她看起来很伤心。
4.感官系动词
感官系动词主要有feel, smell, sound, taste等。
This kind of cloth feels very soft. 这种布料摸起来很柔软。
The flower smells very sweet. 这花闻起来很香。
5.变化系动词
这些系动词表示主语变成什么样，变化系动词主要有become,grow,turn,fall,get,go,come,run等。
He becanme mad after that. 自那之后，他就疯了。
She grew rich within a short time. 她没多长时间久富了。
6.终止系动词
表示主语已终止动作，主要有prove,turn out,表达"证实"，"变成"之意。
The rumor proved false. 这谣言证实是假的。
His plan turned out a success. 他的计划终于成功了。
1. He’s looking for a new job _____ he can get more money to support his family．
A．when B．where C．that D．which
2. Guess what! I came across my primary school science teacher this morning, ______ I have lost touch for almost 20 years.
A. of which B. when C. with whom D. who
3. The CEO of the company is a position __ many abilities are required to deal with all types of problems.
A. which B. that C. when D. where
4. The Nuclear Security Summit is an initiative of Mr. Obama, considers nuclear terrorism to be one of the greatest threats to international security.
A. which B. what C. who D. whom
5. I’d like to give my thanks to those ________ help my son was able to survive this terrible disease,” said the woman on TV.
A. with whose B. whose C. who D. with whom
6. Babies sleep l6 to l8 hours in every 24 hours, and they sleep less ________ they grow older.
A. while B. as C. when D. after
7. I have been keeping the portrait ________ I can see it every day, as it always reminds me of my childhood in Paris.
A. since B. where C. as D. if
8. ________ your composition carefully, some spelling mistakes can be avoided.
A. Having checked B. Check C. If you check D. To check
9. I would never speak to someone like that ________ they said something unpleasant to me.
A. even if B. so that C. as if D. ever since
10. －Did you remember to return the book to our English teacher?
－Yes. I gave it to him ________ I saw him.
A. once B. while C. if D. the moment
