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1、歡迎來到英語課堂歡迎來到英語課堂第三課時第三課時Section A(Grammar Focus3c)單元同步語法精講含有if引導的條件狀語從句的主從復合句由一個主句和一個或一個以上的從句構成的句子叫復合句。若由連接詞引導的句子在復合句中表示條件，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。eg：You will get good grades，if you study hard.如果你努力學習，就會取得好成績。If you dont leave right away，you wil

2、l be late.如果你不馬上來，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.如果你努力學習，你就會通過考試。3條件狀語從句的時態(tài)。若主句為將來時態(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。eg：He will not leave if it isnt

3、fine tomorrow.如果明天天氣不好，他就不會走。(主句用一般將來時，從句用一般現(xiàn)在時)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)單元同步語法強化訓練一、用括號中所給單詞的適當形式填空。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

4、)a birthday party.5If I _(be)free tomorrow，I _(visit)my aunt.will lookweargetwill haveiswill callwill comehaveamwill visit二、單項選擇。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 t

5、eacher 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 Austr

6、alia 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如果他一個人獨自生活，他將養(yǎng)一只狗。If he lives alone,_

7、.If 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安全小貼上課間活動注意安全