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1、第三課時(shí)第三課時(shí)Section A(Grammar Focus3c)單元同步語法精講含有if引導(dǎo)的條件狀語從句的主從復(fù)合句由一個(gè)主句和一個(gè)或一個(gè)以上的從句構(gòu)成的句子叫復(fù)合句。若由連接詞引導(dǎo)的句子在復(fù)合句中表示條件,作主句的條件狀語,則該句子被稱為條件狀語從句。1條件狀語從句的引導(dǎo)詞。條件狀語從句通常由連詞if(如果,假如),unless(ifnot,除非,如果不)引導(dǎo)。eg:You will get good grades,if you study hard.如果你努力學(xué)習(xí),就會取得好成績。If you dont leave right away,you will be late.如果你不馬上
2、來,你將會遲到的。2條件狀語從句的位置。條件狀語從句既可以放在主句之前,也可以放在主句之后。如果放在主句之前,要用逗號與主句隔開;如果放在主句之后,中間不必用逗號。eg:If it doesnt rain tomorrow,we will go shopping.如果明天不下雨,我們將去購物。You can pass the exam if you study hard.如果你努力學(xué)習(xí),你就會通過考試。3條件狀語從句的時(shí)態(tài)。若主句為將來時(shí)態(tài)或是含有情態(tài)動詞的句子或祈使句,則條件狀語從句用一般現(xiàn)在時(shí)。eg:He will not leave if it isnt fine tomorrow.如果
3、明天天氣不好,他就不會走。(主句用一般將來時(shí),從句用一般現(xiàn)在時(shí))If he comes,let me know.如果他來,讓我知道。(主句是祈使句,從句用一般現(xiàn)在時(shí))單元同步語法強(qiáng)化訓(xùn)練一、用括號中所給單詞的適當(dāng)形式填空。1You _(look) younger if you _(wear) this new dress.2If we _(get) up late,we _(have) no time for breakfast.3If there _(be) a fire,I _(call) 119 for help.4Susan _ (come) if you _(have) a birt
4、hday party.5If I _(be) free tomorrow,I _(visit) my aunt.will lookweargetwill haveiswill callwill comehaveamwill visit二、單項(xiàng)選擇。6If she _ a car,she will drive to work every day.Abuys BboughtCwill buy Dis buying7We _ swimming together if he comes this afternoon.AgoBwentCgoingDwill go8What _ if the teache
5、r knows the facts tomorrow?I dont know.Ahappens BhappenedCwill happen DhappeningC AD9If you take part in the game,you _ a good time.Ahave Bwill haveChaving Dhad10I will give him the book if I _ him next week.Ameet BmetCmeeting Dwill meet11Aunt Lucy will tell us something about her trip to Australia
6、when she_back.(2014,重慶)Acomes BcameCwould come Dwill comeBAA三、根據(jù)漢語完成句子。12如果你感覺累,就打電話叫我來替換你。_,please call me to take your place.13如果我吃太多食物,我會變胖的。If I eat too much food,_.14如果我們跑得快,就能趕上最后一班公交車。If we run fast,_.15如果她問你,你會告訴她答案嗎?Will you tell her the answer _?16如果他一個(gè)人獨(dú)自生活,他將養(yǎng)一只狗。If he lives alone, _.If
7、you feel tiredI will get fatwe will catch the last busif she asks youhe will keep a dog1upset 形容詞,意為“心煩的;沮喪的”。eg:He was upset after the exam.考試后他很失望。2advice 是不可數(shù)名詞,意為“建議;勸告”,若表示一條或幾條建議或勸告,要借用piece。eg:some advice一些建議two pieces of advice兩條建議單項(xiàng)選擇。1He felt _after his father died.AangryBupsetCcareless2I have some problems with my English writing. Can you give me some_?Aadvice Bdecisions Cinformation3He often goes home by _after 11:30 pm. There are no buses.Afeet Bbuses CtaxiBAC