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【正文】 本句表示說話人對(duì)現(xiàn)在的情況有所懷疑，所以用過去時(shí)。常用with，without，but for。）If Bob____ with us, he would have had a good time.A. would eB. would have eC. had eD. came（答案為C。表示對(duì)過去能做而未做的事情感到惋惜，遺憾。 Nothing can be seen from here. 從這兒什么也看不見。一、感官動(dòng)詞及使役動(dòng)詞（如：see，feel，hear，watch，make，bid）在主動(dòng)語態(tài)中用無to不定式做賓補(bǔ)，改為被動(dòng)語態(tài)時(shí)要加to。例：The chemistry class _____ for five minutes when we hurried there.A. had been onB. was onC. has been onD. would be on（答案：A）（1995年24題）在含有before, after, as soon as 等連詞引導(dǎo)的狀語從句的復(fù)合句中，由于連詞本身可以明確表示動(dòng)作發(fā)生的先后順序，因此，主句和從句都可以用一般過去時(shí)表示，而不用過去完成時(shí)。1995年49題） （2）It is 3 years since I left Shanghai .我離開上海已經(jīng)三年了。（說明現(xiàn)在燈已經(jīng)關(guān)上了）（2）I have lost my pen. 我把筆丟了。when 和while 的用法（1）I fell and hurt myself while I _____tennis.A. was playing B. am playing C. play D. played2（答案：A。 例：He wanted to know when the conference would start. 他想知道會(huì)議何時(shí)開始。例：Are you going to attend the lecture? 你打算去聽這個(gè)演講嗎？be to +動(dòng)詞原形： 表示安排或計(jì)劃好了的動(dòng)作。例：You’ve already missed too many classes this term .You _____ two classes just last week.A. missedB. would missC. had missed D. have missed （答案：A。表示普遍的真理。由于是眾所周知的客觀事實(shí)，所以一般不用時(shí)間狀語。有具體的時(shí)間狀語要用過去時(shí)。例：The ThirdRing Road is to be open to traffic before National Day.三環(huán)路將在國(guó)慶節(jié)前通車。 五、現(xiàn)在進(jìn)行時(shí) 表示此時(shí)此刻（說話時(shí)）正在進(jìn)行的動(dòng)作。連接詞when 表示時(shí)間上的點(diǎn)，其所引導(dǎo)的句子用過去時(shí)，while 表示持續(xù)的一段時(shí)間，其所引導(dǎo)的句子用過去進(jìn)行時(shí)。（說明過去某時(shí)丟的，現(xiàn)在我還沒有找到這支筆。（如果是非延續(xù)動(dòng)詞，這時(shí)常用 it is +時(shí)間+since 的句型代替，從句用過去時(shí)態(tài)。例：I called him as soon as I 。The middleaged man was seen _____ out of the house on the afternoon of the murder.A. came B. e C. to e D. have e （答案為C）（2000年58題） We were made to study harder. 我們被要求努力學(xué)習(xí)。 四、用主動(dòng)表示被動(dòng)的含義 常用：need/require +doing sth（=to be done）（此句型主語大多為物） 例：My room is a mess. It needs _____. A to be tidying up B. tidying up C. to tidy up 5D. tidied up（答案為B）（2000年47題） 第三節(jié) 情態(tài)動(dòng)詞考試重點(diǎn)：情態(tài)動(dòng)詞+完成時(shí)情態(tài)動(dòng)詞用來表示能力、允許、許諾、可能、勸告、意愿等概念或態(tài)度。 He could have joined us, but he didn’t get our invitation in time. 6他本來能夠參加我們的，但是他沒有收到我們的請(qǐng)貼。與過去的事實(shí)相反，從句的謂語動(dòng)詞用過去完成時(shí)。Without your help, we _____ so much.A. didn’t achieveB. would not have achievedC. will not
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