1、重溫一道引起思緒混亂的題After a wonderful meal, they told stories and sang songs by the campfire. 表示 在之后”的句式：after+從句/doing/n.after I arrived => After my arrival在我至 U達(dá)之后完成同義句轉(zhuǎn)換：whe n the pla ne arrived =After his arrival, we have a party.=時(shí)態(tài)使用重大的規(guī)則：（12字原則）主過從過，主將從現(xiàn)，主現(xiàn)從任【主將從現(xiàn)】常見的有以下 二種情況：一、When/if引導(dǎo)的主句是一般將來時(shí)，

2、從句用一般現(xiàn)在時(shí)。I'll tell her the good n ews when she comes back當(dāng) 她回來的時(shí)候，我將把這個(gè)好消息告訴她。If it does n't rai n, he will come here on time如 果不下雨，他會(huì)按時(shí)來這兒的。二、如果主句是 祈使句，那么從句要用一般現(xiàn)在時(shí)。Don laugh at me when I make a mistake.我犯錯(cuò)誤的時(shí)候不要笑話我。三、如果主句是 含有情態(tài)動(dòng)詞的一般現(xiàn)在時(shí)，從句多用一般現(xiàn)在時(shí)。You should be quiet whe n you are in the read

3、ing room.在閱覽室時(shí)應(yīng)保持安靜。【主過從過】常見的有以下 _ 種情況：1. 直接引語變成間接引語2. 賓語從句中，當(dāng)主句的謂語動(dòng)詞為過去時(shí)態(tài)時(shí)，從句須用表示過去的某種時(shí)態(tài)。 例如：He asked whe n they would go to the party他問他們什么時(shí)候?qū)⑷⒓泳蹠?huì)。 Miss Green said she had bee n to Beiji ng before.林小姐說她以前曾經(jīng)去過北京。【主現(xiàn)從任】常見的有以下種情況：在賓語從句中，當(dāng)主句的時(shí)態(tài)為 現(xiàn)在的某種時(shí)態(tài)（一般現(xiàn)在時(shí)、現(xiàn)在進(jìn)行時(shí)、現(xiàn) 在完成時(shí)等）后面從句時(shí)態(tài)不受主句限制，可選用各種適合的時(shí)態(tài)。例如：

4、Do you know whe n we'll have a football match?爾知道我們什么時(shí)候舉行足球賽嗎？You know he has gone to Sha nghai爾知道他已去上海了。【特別關(guān)注】1當(dāng)賓語從句表述的是 客觀事實(shí)、科學(xué)真理、現(xiàn)在的習(xí)慣動(dòng)作以及格言等時(shí)，只能用一般現(xiàn)在時(shí)。例如：The teacher told us that light travels faster tha n soun 老師告訴我們光速比音速要 快。2如果主、從句表示的動(dòng)作是一前一后發(fā)生的，則先前的用過去完成，在后的只能用一般過去時(shí)態(tài)。When he got there, the

5、 train had left.當(dāng)他到那兒的時(shí)候，火車已經(jīng)開了。【小試身手】1. If heharder , he will catch up with us soon.（04 北京）A. study B. studies C. will study D. studied 2. I will go swimmingwith you if Ifree tomorrow.（04 哈爾濱）A. will be B. shall be C. am D. was3.If youa cha nee to study in a foreig n country ,just take it .（04 蘇州）A

6、. getting B. had got C. will get D. get4. Don 'letve until heback.（）A. have come B. comes C. will come D. came5. “ Shall we have the volleyball match tomorrow?”“ Oh, it will be put off if it（04黃岡）A. snows B. is snowing C. sno wed D. will snow6. Tell him about the n ews whe n he,Joh n.-Yes, I wil

7、l. （04 寧波）A.comes B.will come C.would D.is coming7. Tomorrow we will go to the city parkit is sunny.（05 安徽） A.as soon as B. when C. if D. as8. Please don ' t leave until your teacherba05.河南）A. will come B .came C.comes D. is coming9want to know if therea sports meet ing n ext month . If theyit , I must getready for it°（ 05 青島）A. is,will holdB. will be, holdC. will be, will hold D. will have, hold10. Mary, what about going boat in