1、sectionA grammar,八下英語Unit 6 An old man tried to move the mountains.,Grammar Focus,Conditional clauses with if and unless,含有if的復(fù)合句由兩個(gè)分句組成；if 為連詞，引 導(dǎo)條件狀語從句，另一句為主句。,如果談?wù)摰氖悄骋粋€(gè)動(dòng)作發(fā)生后勢必會產(chǎn)生某個(gè) 結(jié)果，那么主從句都用一般現(xiàn)在時(shí)態(tài)。,e.g. If you boil water, it becomes steam. If you drop a glass, it breaks. If you heat metal, it me

2、lts. If you run, you sweat.,If you put wood into water, it _ (float).,floats,Unless 的用法,如果談?wù)摰氖侨绻骋粋€(gè)動(dòng)作或事情發(fā)生后，很 可能將會產(chǎn)生某種結(jié)果，那么在復(fù)句中主句的動(dòng)詞 用一般將來時(shí)，而if從句仍然是一般現(xiàn)在時(shí)。,e.g. If it rains, we wont take a hike tomorrow. He will get up school on time if the clock goes off. If he arrives in Hong Kong, he will call me.

3、,If you dont start early, you _the beginning of the film (miss),will miss,若 if 條件句放句首，從句后面要加逗號，和主句 隔開。 unless 與if 用法相似，相當(dāng)于ifnot,e.g. You will fail the exam if you dont prepare for it. You will fail the exam unless you prepare for it. If he doesnt look up the word in the dictionary, he wont know its

4、meaning. He wont know the words meaning unless he looks it up in the dictionary.,She will miss the train unless she _ up early.,gets,if和unless的用法 一般情況下，unless相當(dāng)于ifnot，可以互換。用一般現(xiàn)在時(shí)代替將來時(shí)。 I wont let you in unless you show me your pass = I wont let you in if you dont show me your pass.如果你不出示通行證，我就不讓你進(jìn)來。

5、 如果主句描述的是情感或情緒活動(dòng)方面的內(nèi)容，ifnot結(jié)構(gòu)不能換成unless。如： Ill be quite glad if she doesnt come this evening. 她今晚如果不來我很高興。 1.Unlessyoutakemorecare,youllhaveanaccident.如果不多加小心的話，你會出事故的。,2. Mybabysisternevercriesunlesssheishungry. 我那剛出生的妹妹除非餓了，否則她是從來不哭的。 3.Dontpromiseanythingunlessyoure100percent sure.不要作任何的許諾,除非你有百分

6、百的把握。4.Unlessbadweatherstopsme,Ijogeveryday. (除非壞天氣作梗，每天我都慢跑。) 誤:Dont come in unless you will be invited to. 正:Dont come in unless youre invited to. 誤:Unless he will come, we wont be able to go. 正:Unless he comes, we wont be able to go.,As soon as 的用法,英語動(dòng)詞的時(shí)間大致可分為三段：過去時(shí)、現(xiàn)在時(shí)、將來時(shí)。假設(shè)有兩件事A和B，就會出現(xiàn)三種情況： A

7、 過去時(shí) as soon as B 過去時(shí) A 現(xiàn)在時(shí) as soon as B 現(xiàn)在時(shí) A 將來時(shí) as soon as B 將來時(shí) 在每一個(gè)大的時(shí)間段內(nèi)，A 和 B 的時(shí)態(tài)要統(tǒng)一。比如 A 過去時(shí)，B 肯定在過去時(shí)內(nèi)。其它也是如此。至于在每個(gè)大時(shí)間段內(nèi)，再根據(jù)A 和 B兩件事的具體情況，具體對待。比如：A 和B都是過去時(shí)，A 和 B 是同時(shí)發(fā)生，還是先后發(fā)生，不是即將發(fā)生，再分別選用完成時(shí)、進(jìn)行時(shí)、將來時(shí)。例如：,A 過去時(shí) B 過去時(shí)： I arranged the flowers in the vase as soon as I came back home. 一回到家里，我就把花在花

8、瓶里插好。 A 過去進(jìn)行時(shí) B 過去完成時(shí)(虛擬) He was shaking with fright as if he had seen a ghost. 他嚇得直哆嗦，就好像看見了鬼一樣。 A 將來時(shí) B 將來時(shí)(可用一般現(xiàn)在時(shí)表達(dá)) They will post me the tickets/post the tickets to me as soon as they receive my cheque. 他們收到我的支票后就立刻把票寄給我.,as soon as連接的時(shí)間狀語從句中，指未發(fā)生的動(dòng)作。規(guī)律是：主句一般將來時(shí)，從句用一般現(xiàn)在時(shí)代替一般將來時(shí)。 如： I will tell

9、 him the news as soon as he comes back。 指緊接著發(fā)生的兩個(gè)短動(dòng)作，主從句都用一般過去時(shí)如：He took out his English books as soon as he sat down. 就這兩種情況 ，熟記就行。 在賓語從句中，當(dāng)主句為與過去時(shí)的時(shí)候，從句必須用與主句相對應(yīng)的時(shí)態(tài)，所以為了與主句動(dòng)詞said呼應(yīng)，時(shí)間狀語從句中的will look up應(yīng)該對應(yīng)為過去將來時(shí)態(tài)would look up，finds對應(yīng)為found。,so . that. 如此.以致于. (that 引導(dǎo)的結(jié)果狀語從句) so的后面跟副詞或形容詞 例句： 老師說的

10、太快了，以至于我聽不清楚他的話。 The teacher speaks so fast that I cant catch the words.,sothat 的用法,比較sothat與so that So that: （1）引導(dǎo)結(jié)果狀語從句，意為“因此，所以”，主句和從句間常用逗號分開，一般不與情態(tài)動(dòng)詞連用。 Nothing more was heard of him，so that people thought that he was dead. 未再聽到他的消息，以致人們認(rèn)為他已死去了。 （2）引導(dǎo)目的狀語從句，意為“為了，以便”，通常從句中用may，might，can，could等情態(tài)

11、動(dòng)詞。 We left early so that we could catch the first bus. 我們很早出發(fā)，以便能趕上第一班汽車。,1. _ her father died, the stepsisters made her do all the chores. 2. She was_busy_ she had no time to make a dress for the party. 3. The mice knew that _ they helped her make a dress, she would not be able to go to the party.

12、 4. _ the prince saw her, he fell in love with her.,4a. Fill in the blanks with unless, as soon as or so . that.,As soon as,so that,unless,As soon as,5. The prince knew that _ the girls foot could fit the shoe, it was not the right girl. 6. The new couple were _ happy _ they couldnt stop smiling whe

13、n they got married.,unless,so that,The Monkey King is the main character from the famous Chinese story Journey to the West. He is wonderful because he_ (help) weak people. The Monkey King _(have) a magic stick. He_ (use) it to fight bad people. He can_ (make) the stick big or small. He can sometimes

14、 make the stick so small that he,4b. Fill in the blanks with the correct forms of the verbs in brackets.,helps,uses,make,has,can put it in his ear. As soon as he_ (see) bad people, he thinks of ways to fight them. He can _(turn) himself into different animals and objects. But unless he can hide his

15、tail, he cannot make himself a human. Children all over the world_ (love) the Monkey King!,sees,turn,love,4c. Tell your partner about your favorite story.,My favorite story is . It is interesting because,他努力學(xué)習(xí)，以便取得好成績。 He works hard _ he can get good result. 2. 老師寫得很仔細(xì)，是為了讓我們看得清楚。 The teacher wrote

16、carefully _ we could see clearly. 3. 他太傷心了，以致說不出一個(gè)字來。 He is _he cant say a word. 4.妹妹身體太弱了，不能再走了。 My sister is _ she cant walk farther.,so that,so that,so sad that,so weak that,一、用sothat 填空。,二、按要求轉(zhuǎn)換下列句型 1.Jimdidhishomeworklastnight.(改為否定句) Jim_hishomeworklastnight. 2.DidshestudyJapanese?（作肯定回答） _,she_. 3.Theydliketomatoes.（改為一般疑問句） _they_tomatoes? 4.TheywatchedTVlastnight. (改為一般疑句) _theywatchTVlastnight?,didnt do,Yes did,Would like,Did,三、用所給詞的適當(dāng)形式填空. 1.Listen!She_(sing)ABCsong. 2.Theyusually_(go) shoppingon Saturdaybutthey_（notdo） ityesterday. 3.