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它 4例句:By the time you get back, great changes will have taken place in this ,就將發(fā)生巨大的變化。 十二、 過去將來完成時(shí) ?。罕硎驹谶^去某一時(shí)間對將來某一時(shí)刻以前所會發(fā)生的動作,常用在虛擬語氣中,表示與過去的事實(shí)相反。 ?。簊hould/would have done sth. ?。篒 thought you39。d have left by this 。 He told them he would have finished it by 8 o39。 十三、 現(xiàn)在完成進(jìn)行時(shí) ?。罕硎緩倪^去某一時(shí)間開始一直延續(xù)到現(xiàn)在的動作。這一動作可能剛剛開始,也可能仍在繼續(xù),并可能延續(xù)到將來。 ?。褐髡Z + have/has + been + doing + 其它 ?。簊ince + 時(shí)間點(diǎn),for + 時(shí)間段等。 ?。篒 have been sitting here for an 。 The children have been watching TV since six o39。,孩子們一直看電視。 十四、 過去完成進(jìn)行時(shí) ?。罕硎灸硞€正在進(jìn)行的動作或狀態(tài),持續(xù)到過去某個時(shí)刻,還未完成,一直持續(xù)到之后的當(dāng)前才結(jié)束。 ?。褐髡Z + had + been + doing + 其它 ?。篠he had been suffering from a bad cold when she took the 。 Had they been expecting the news for some time? 他們期待這個消息有一段時(shí)間了吧? :①尚未完成:He had been writing the 。(他沒寫完) ?、谄髨D:He had been studying the meaning of this 。(他曾努力學(xué)習(xí)過它) ?、畚吹媒Y(jié)果:We had been studying what our enemy had 。(但是我們沒有理解) ?、茏罱闆r:He had been quarrelling with his 。(最近) ?、莘磸?fù)動作:He had been asking me the same 。(屢次) ?、耷榫w:What had he been doing?他做了什么?(不耐煩) 十五、 將來完成進(jìn)行時(shí) :表示動作從某一時(shí)間開始一直延續(xù)到將來某一時(shí)間。是否繼續(xù)下去,要視上下文而定。 ?。簊hall/will have been doing ?。篒 shall have been working here in this factory for twenty years by the end of the ,我將在這個工廠工作20年了。 If we don39。t hurry up the store will have been closing before we get there. 咱們?nèi)绮豢煲稽c(diǎn)兒,等我們到了那兒,店門就會關(guān)了。 十六、 過去將來完成進(jìn)行時(shí) ?。罕硎緩倪^去某時(shí)看至未來某時(shí)以前會一直在進(jìn)行的動作。 ?。簊hould/would + have + been +現(xiàn)在分詞 :He told me that by the end of the year he would have been living there for thirty ,到年底時(shí),他就在那住了30年了。主動語態(tài)和被動語態(tài)一、 被動語態(tài)的用法: 1. 一般現(xiàn)在時(shí)的被動語態(tài)構(gòu)成:is / am / are + 及物動詞的過去分詞 Our classroom is cleaned every day. 我們教室每天都被打掃。 I am asked to study hard. 我被告知要努力學(xué)習(xí)。 Knives are used for cutting things. 刀是用來切東西的。 2. 一般過去時(shí)的被動語態(tài)構(gòu)成:was / were + 及物動詞的過去分詞 A new shop was built last year. 去年修了一座新商店。 Dinosaur eggs were laid long long ago. 恐龍蛋被放置了很久很久。 3. 一般將來時(shí)的被動語態(tài)構(gòu)成:will+ be + 及物動詞的過去分詞 A new hospital will be built in our city. 我們城市將要修建一家新醫(yī)院。 Many more trees will be planted next year. 明年會種更多的樹。 4. 現(xiàn)在進(jìn)行時(shí)的被動語態(tài)構(gòu)成:am / is / are + being + 及物動詞的過去分詞 Uncle Wang is mending my bike now.→ My bike is being repaired by Tom now. 王叔叔正在修理我的自行車。 They are planting trees over there. → Trees are being planted over there by them. 他們在那里種植的樹木。 5. 現(xiàn)在完成時(shí)的被動語態(tài)構(gòu)成:has / have + been + 及物動詞的過去分詞 This book has been translated into many languages. 這本書被翻譯成多種文字。 Many manmade satellites have been sent up into space by many countries. 在許多國家有許多人造衛(wèi)星被送上了太空。 :was/were + being + 及物動詞的過去分詞 The boy was being operated on when his parents hurried to the 。 The new road was being 。 :had + been + 及物動詞的過去分詞 The classroom hadn’t been cleaned before the teacher came. 在老師來之前,教室尚未打掃。 The tickets had been sold out before I came to the 。 :shall/will + have done They will have been married for 20 years by then. 屆時(shí),他們結(jié)婚將滿20周年。 The project will have been pleted before 。 :情態(tài)動詞 + be + 及物動詞的過去分詞 Young trees must be watered often. 小樹需要經(jīng)常澆水。 Your mistakes should be corrected right now. 你應(yīng)該現(xiàn)在就改正你的錯誤。 The door may be locked inside. 這扇門可以反鎖。 Your homework can be handed in tomorrow. 你的家庭作業(yè)可以明天交。 二、 怎樣把主動語態(tài)改成被動語態(tài)? 把主動語態(tài)改為被動語態(tài)非常簡單,可以遵循以下幾個步驟: 1. 先找出謂語動詞; 2. 再找出謂語動詞后的賓語; 3. 把賓語用作被動語態(tài)中的主語; 4. 注意人稱、時(shí)態(tài)和數(shù)的變化。 例:1. Bruce writes a letter every week. →A letter is written by Bruce every week. 2. Li Lei mended the broken bike this morning. →The broken bike was mended by Li Lei this morning. 李雷今天上午在修理壞的自行車。 3. He has written two novels so far. →Two novels have been written by him so far. 至今他已寫了兩部小說。 4. They will plant ten trees tomorrow. →Ten t