動(dòng)詞(時(shí)態(tài),語態(tài),用法,省略,一致性等)
　　時(shí)態(tài)
　　1)現(xiàn)在完成進(jìn)行時(shí)態(tài) (have/has been + -ing 分詞構(gòu)成): 動(dòng)作或狀態(tài)從過去某時(shí)開始,繼續(xù)到現(xiàn)在,可能繼續(xù)下去,也可能剛剛結(jié)束.
　　I’ve been writing letters for an hour.
　　I’ve been sitting in the garden.
　　2)過去完成進(jìn)行時(shí)(由had been + ing分詞構(gòu)成): 過去某個(gè)時(shí)刻以前一直在進(jìn)行的動(dòng)作
　　I’d been working for some time when he called.
　　We had been waiting for her for two hours by the time she came.
　　3)將來完成進(jìn)行時(shí): 將來某個(gè)時(shí)刻以前一直在進(jìn)行的動(dòng)作.
　　By next summer, he will have been working here for twenty years.
　　In another month’s time she’ll have been studying here for three years.
　　4)將來完成時(shí)(由shall/will have + 過去分詞構(gòu)成): 將來某時(shí)會(huì)業(yè)已發(fā)生的事.
　　I shall have finished this one before lunch.
　　They’ll have hit the year’s target by the end of October.
　　語態(tài)
　　可以有兩種被動(dòng)結(jié)構(gòu)的類型,例如:
　　He was said to be jealous of her success.
　　It was said that he was jealous of her success.
　　能同時(shí)適用于上述兩個(gè)句型的主動(dòng)詞通常都是表示“估計(jì)”,“相信”等意義的動(dòng)詞,常見的有assume,believe,expect,fear,feel,know,presume,report,say,suppose,understand等.
　　It is supposed that the ship has been sunk.
　　The ship is supposed to have been sunk.
　　擔(dān)當(dāng)be supposed to 與不定式的一般形式搭配時(shí)往往表示不同的意義.例如:
　　Why are you driving so fast in this area? You are supposed to know the speed to know the speed limit. (你應(yīng)該曉得速度限制)
　　雙賓語及賓補(bǔ)結(jié)構(gòu)的被動(dòng)語態(tài)
　　雙賓語結(jié)構(gòu)的被動(dòng)語態(tài): 雙賓語結(jié)構(gòu)變?yōu)楸粍?dòng)語態(tài)時(shí),可以把主動(dòng)結(jié)構(gòu)中的一個(gè)賓語變?yōu)橹髡Z,另一個(gè)賓語仍然保留在謂語后面,但多數(shù)是把間接賓語變?yōu)橹髡Z.
　　He was asked a number of questions at the press conference.
　　Two days were allowed them for making the necessary preparations.
　　賓補(bǔ)結(jié)構(gòu)的被動(dòng)語態(tài)
　　She was called Big Sister by everybody.
　　Then he was made a squad leader.
　　He was considered quite qualified for the job.
　　The room was always kept clean and tidy.
　　短語動(dòng)詞
　　Vi + adv
　　The plane took off two hours late.
　　Vi + prep
　　They looked round the Cathedral.
　　Vi + prep (有被動(dòng)語態(tài))
　　She’s looking after her sister’s children.
　　The children were always well looked after.
　　Vi + adv + prep
　　I began to look forward to their visits.
　　Vt + O + adv
　　Some women choose to stay at home and bring up their children.
　　The children were brought up by their mother.
　　They took him on.
　　Vt + adv + O (無被動(dòng)語態(tài))
　　I am trying to give up smoking.
　　Vt + O + prep
　　We talked Donald into agreement.
　　省略
　　在以as, than, when, if, unless等引導(dǎo)的從句中的省略: 在有些狀語從句中,如果謂語包含有動(dòng)詞be,主語又和主句的主語一致a),或者主語是it b),就常?？梢园褟木渲械闹髡Z和謂語的一部分(特別是動(dòng)詞be)省略掉.
　　Look out for cars when crossing the street.
　　When taken according to the directions, the drug has no side effects.
　　While there he joined in voluntary labour on a project.
　　Although not yet six months old, she was able to walk without support.
　　If not well managed, irrigation can be harmful.
　　Though reduced in numbers, they gained in fighting capacity.
　　This viewpoint, however understandable, is wrong.
　　Enemies, once discovered, were tightly encircled and completely wiped out.
　　She hurriedly left the room as though/if angry.
　　She worked extremely hard though still rather poor in health.
　　Fill in the application as instructed.
　　Whenever known, such facts should be reported.
　　The documents will be returned as soon as signed.
　　He said that no acrobat could ever perform those daring feats unless trained very young.
　　Once having made a promise, you should keep it.
　　If necessary I’ll have the letter duplicated.
　　Fill in the blanks with articles where(ver) necessary.
　　If possible, I should like to have two copies of it.
　　As scheduled, they met on January 20 at the Chinese Embassy.
　　在以than a) 或 as b) 引起的從句中,常會(huì)有一些成分省略.
　　He told me not to use more material than (it is) necessary.
　　We should think more of the collective than of ourselves.
　　They worked with as much enthusiasm as young people (did).
　　He is now a vice-manager, but still often works in the kitchen as before.
　　Their training is free, as is all education.
　　We will, as always, stand on your side.

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　　　　　　　2011年四六級(jí)備考之重要的不定式語法

　　錯(cuò)誤的省略
　　His life is as fully committed to books as anyone I know.
　　While standing there in her nightgown, two bullets struck the wall beside her.
　　一致
　　如果主語是單數(shù),盡管后面跟有with, together with, as well as, as much as, no less than, more than等引導(dǎo)的短語,謂語動(dòng)詞仍舊用單數(shù)形式.
　　Terry, along with her friend, goes skating every Saturday.
　　An expert, together with some assistants, was sent to help in this work.
　　The captain, as well as the coaches, was disappointed in the team.
　　代詞作主語時(shí)的一致
　　each, either, neither和由some, any, no, every構(gòu)成的復(fù)合代詞,都作單數(shù)看待.
　　Each of us has something to say.
　　Is everybody ready?
　　Somebody is using the phone.
　　Neither of us has gone through regular training.
　　Has either of them told you?
　　some, few, both, many 等作復(fù)數(shù)
　　some 可后接復(fù)數(shù),也可接單數(shù),表示某一.
　　none作復(fù)數(shù)看待時(shí)較多,但也有時(shí)作單數(shù)看待,主要看說話人腦中聯(lián)系想到的是復(fù)數(shù)還是單數(shù)概念, 但none 在代表不可數(shù)的東西時(shí)總是看作單數(shù):
　　None of the books are easy enough for us
　　None of us seem to have thought of it.
　　None (= not a single one) of us has got a camera.
　　None (= nobody) has felt it more keenly than she did.
　　None of this worries me.
　　all 和most 可后接復(fù)數(shù),也可接不可數(shù)名詞 (all of the…, most of the …), 動(dòng)詞用單數(shù).
　　由and 或 both… and 連接名詞詞組時(shí), 后用復(fù)數(shù); 由not only…but (also), either…or, neither…nor或 or 連接的并列主語, 謂語通常和最鄰近的主語一致.
　　Not only the switches but also the old writing has been changed.
　　My sister or my brother is likely to be at home.
　　Either you or Mr Yang is to do the work.
　　Neither my wife nor I myself am able to persuade my daughter to change her mind.
　　如果一個(gè)句子是由there 或here引導(dǎo), 而主語又不止一個(gè), 謂語通常也和最鄰近的那個(gè)主語一致.
　　There was carved in the board a dragon and a phoenix.
　　Here is a pen, a few envelopes and some paper for you.
　　people, police, cattle, poultry (家禽), militia (民兵) 等通常都用作復(fù)數(shù).
　　Cattle are grazing on the pasture.
　　The police are looking for him.
　　有些集體名詞有時(shí)作單數(shù)看待, 有時(shí)作復(fù)數(shù)看待, 主要根據(jù)意思來決定.
　　His family isn’t very large.
　　His family are all music lovers.
　　The committee meets twice a month.
　　The committee are divided in opinion.
　　The audience was enormous.
　　The audience were greatly moved at the words.
　　有些名詞單復(fù)數(shù)同形, 可根據(jù)意思決定謂語動(dòng)詞的數(shù):
　　This new series is beginning next month.
　　These new series are beginning next month.
　　This species is now extinct.
　　These species are now extinct.
　　表示時(shí)間, 重量, 長度, 價(jià)值等的名詞, 盡管仍是復(fù)數(shù)形式, 如果作整體看待, 動(dòng)詞也可用單數(shù)形式 (當(dāng)然用復(fù)數(shù)動(dòng)詞也是可以的):
　　Three weeks was allowed for making the necessary preparations.
　　One hundred li was covered in a single night.
　　其他問題
　　書名, 國家名用單數(shù):
　　Tales from Shakespeare is a book by Charles Lamb.
　　學(xué)科名, 如mathematics, economics用單數(shù).
　　many a 或more than one 所修飾的詞作主語時(shí), 謂語動(dòng)詞多用單數(shù)形式:
　　Many a person has had that kind of experience.
　　More than one person has involved in the case.
　　a number of 后接復(fù)數(shù), the number of后接單數(shù):
　　A number of books have been published on the subject.
　　The number of books published on the subject is simply amazing.
　　one of those 后用單數(shù). 在“one of + 復(fù)數(shù)名詞 +關(guān)系分句”結(jié)構(gòu)中，關(guān)系分句中謂語動(dòng)詞的單復(fù)數(shù)形式在一般情況下有兩形式，一是根據(jù)先行詞采用復(fù)數(shù)形式：
　　Joan is one of those people who go out of their way to be helpful.
　　當(dāng)one 之前友the only 等限定詞和修飾語時(shí)，關(guān)系分句謂語動(dòng)詞根據(jù)one 而定，即采用單數(shù)形式：
　　He is the only one of those boys who is willing to take on another assignment.

　　相關(guān)推薦：四六級(jí)考試七大核心語法逐項(xiàng)解析
　　　　　　　2011年四六級(jí)備考之重要的不定式語法

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