省略句是高考英語常考的一類句型，省略句的種類主要有：主語的省略、謂語的省略、狀語從句的省略、不定式的省略。下面是巨人英語網小編整合的省略句的用法集錦，希望對大家有幫助。
Ⅰ、狀語從句中的省略用法
一、如果從句的主語和主句的主語一致，且從句的謂語含有be動詞的某種形式（am/is/are/was/were），可同時省略從句的主語和be動詞的某種形式。
1、when，while引導的時間狀語從句
e.g. Do be careful when (you are) crossing the street.When/While (I was) on my way to work, I met her.
2、if，unless，once引導的條件狀語從句e.g. If (it is) properly treated, waste will do no harm to the environment.
I’ll not go to the party unless (I am) invited.
Once (you are) caught stealing in a supermarket, you will be punished.
3、though，although，whether，no matter whether/what/how/who等引導的讓步狀語從句
e.g. He was happy, though/although (he was) poor.Whether (she is) sick or well, she is always cheerful.
No matter how/However hard the task (is), we must fulfill it in time.（注：從句的主語和主句的主語不一致時，只省略從句中的be動詞形式）
4、as if，as though引導的方式狀語從句
e.g. He rubbed his eyes and yawned as if/though (he was) waking up after a long sleep.
He stood up as if/though (he wanted) to leave.（as if/though + to do表示一個將來的動作）
二、than，as引導的比較狀語從句中的省略用法：
當不同的主語進行比較時，一般省略從句中的謂語；當從句中的主語與謂語（be動詞除外）和主句中的主語與謂語相同時，通常省略從句中的主語和謂語，只保留比較部分。
e.g. He is taller than his brother (is).
I have as much as confidence in you as (I have confidence) in him.
三、以if從句為代表的狀語從句中的特殊省略用法：通常省略了it is，that is，there is/are。
e.g. If (it is) possible/necessary, this old temple will be rebuilt.
If (that is) so, I will call you back at 5:00 pm.
There are only a few books in our school library, if (there are) any.
Ⅱ、定語從句中的省略用法
關系詞的省略 關系代詞that，which，whom等在限制性定語從句中充當賓語且不位于介詞之后時，可以省略；in which或that在先行詞way后作方式狀語從句時可省略。
e.g. The man (that/who/whom) you visited last night is my grandpa.
I don’t like the way (in which/that) you treat the girl.
Ⅲ、虛擬語氣中if及should的省略
1、當條件狀語從句中有were，had，should等時省略if，把它們提至句首，形成倒裝句。
e.g. If I were a teacher, I would be strict with my students.= Were I a teacher, I would be strict with my students.
2、Suggest，insist，order，require等表示建議、要求、命令的動詞后接的名詞性從句中，謂語動詞常用“should+動詞原形”，should可以省略。e.g. The doctor suggested that he (should) try to lose weight.
Ⅳ、不定式符號to的省略
1、感官動詞see，hear，feel，watch等和使役動詞have，make，let等后接不定式作賓語時，不定式省略to。
2、do nothing but，can’t help but等結構常接省略to的不定式。
e.g. We didn’t do anything but stay at home watching TV yesterday.
Hearing the news, she couldn’t help but cry.
3、在特定語境中為了避免重復，當不定式再次出現時，在want，wish，hope，try，plan，like，love，hate后往往只保留to，而省略后面的動詞。但不定式后有be，have時，也保留be和have。
e.g. My parents encouraged me to go to college, but I didn’t want to.
Ⅴ、So和not的替代性省略
用于避免重復前面所說過的內容，替代詞so/not替代肯定或否定的名詞性從句。可與believe，do，expect，fear，guess，hope，say，speak，suppose，think，I’m afraid等連用
e.g. – Do you suppose he is going to attend the meeting? – I suppose not
Ⅵ、日常交際中的省略
在情景會話中，答語常常省略不會引起歧義的主語、謂語或賓語部分，而只保留對方希望了解的內容。在復合句或并列句中，也有省略主、謂、賓的情況。
e.g. – How many copies do you want? -- (I want) Three copies, please.
-- Have you ever been to the Great Wall? -- No, (I have) never (been to the Great Wall).
省略句用法專項練習
1、-Lucy，could you please spare me a few minutes?
-____，but I hope "a few minutes" won't turn into a few hours.
A. It doesn't matter B. That's kind of you C. I'm afraid not D. I guess so
2、-Hey，taxi!-_____-I want to go to the dentist's.
A. Good morning, sir. B. Nice to see you, sir. C. Where to, sir? D. What are you going to do, sir?
3、The doctor expresses his strong desire that the patient_____immediately.
A. be operated on B. operated on C. was operated on D. would be operated on
4、When he came back, he found the bag he had____over the seat was gone.
A. left to hang B. left hanging C. left hung D. to leave hanging
5、Liu Xiang spoke slowly to the Special Olympic competitors so as to have them____.
A. understand him B. to be understood C. be understood D. to understand him
6、-Are there any English story books for us students in the library?
-There are only a few, ____.A. if any B. if have C. if some D. if has
7、Francis, ____born in Kentucky, lived and practiced law in Missouri.A. was B. he was C. although D. but
8、-Does Betty know where her violin is?
-She saw somebody walking off with one, but she doesn't know____.
A. whose B. it C. whom D. which
9、-Aren't you the manager?-No, and I ____.
A. don't want B. don't want to C. don't want to be D. don't
10、-How are you getting on with your work?
-Oh, I'm sorry. Things aren't going so well as____.A. plans B. planning C. planned D. to plan
11、-What's the matter with you?
-I didn't pass the test, but I still____.A. hope so B. hope to C. hope it D. hope that
12、The doctor did what he could ___ the boy, but in vain.
A. save B. to save C. saving D. saved
13、-You look happy today, Mary.
-I like my new dress and Mother ___, too.A. likes B. does C. is D. do
14、-What happened to the boy? He was making so much noise.
-He wanted to play football, but his mother warned him ____.A. not B. to C. not to D./
15、____ for your brother, I would not have gone to see Mr. Wang.
A. If it is not B. Were it not C. Had it not been D. If they were not
參考答案：1-5 DCABA 6-10 ACACC 11-15 BBBCC