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1、if中文如果是否时态当“如果”讲引导的是（条件）状语从句。1. 主句一般将来时，if从句一般现在时.2. .主句有情态动词，if从句一般现在时3. 主句是祈使句，if从句一般现在时当“是否”讲引导是宾语从句。从句在动词或介词后。If从句的时态有主句决定。位置If从句放在句首，用逗号与主句隔开；放在主句后面，if前面不必用逗号。不放在句首，只放在动词介词后面。课本例句1. If you eat my food, I wont talk to you. (P58)2. I will die , I dont have food, (P58)3. What shall we do if it rai
2、ns tomorrow?5. She asked me if I was fond of music. 她问我是否喜欢音乐。6. Can you tell me if theyre planning to come? 你能告诉我他们是否打算过来吗？7. I dont know if shes coming. 我不知道她是否会来。相关词组if you want/like 如果你愿意的话 You can come and stay with us if you want.if so如果是的话 Are you planning to return to work, and if so, who is
3、 going to look after the baby?if not如果不是的话 Has anyone dealt with the technical problems? And if not, why not?if necessary/if possible 如果必要/可能的话 We are ready to fight for our rights if necessary. I should like to be back here by 10:30 if possible.even if即使 Id rather never sell this painting, even if
4、they offered me a million dollars.what if 要是，那怎么办？ 如果那会怎样？ What if the boss walked in here now and saw us?as if好像是 She always talks to me as if she was my sister.相关练习动词填空：1. If it _ (be) sunny tomorrow, I _( walk) to school .2. We _ (not have ) our sports meeting if the weather _ (not be ) fine.3. I
5、f it _ (rain ), my father _ (take ) me to school in his car .4. Tigers _ (hunt ) for their own food if they _ (live) in the wild.5. If wolves _ (be) in the wild, they _(live) as family groups.6. If we dont help the wild animals in danger, they _ (die) soon.单项选择：( )1.I dont know if he _ tomorrow . If
6、 he _, I will tell him about it . A. will come; will come B. comes ; comes C. comes; will come D. will come ; comes( ) 2. If Simon _ hard, he _ good at English. A. work; is B. works; is C. works; will be D. will work; will be( ) 3. He will come _ you ask him. A. whether B. unless C. if D. while( ) 4
7、. If the phone _, can you answer it ? A. rings B. is ringing C. will ring D. rang( ) 5. Please give me a ring if you _next Sunday.A. wont go B. dont go C. not go D. not to go( ) 6.Do you know if his school _a sports meeting next month.A.holdB.holdsC.toholdD.willhold( ) 7.We are not sure if it _tomor
8、row. If it _, we wont climb the South Hill.A. will now, snows B. will snow, will snow C. snows, snows D. snows, will snow( ) 8. If we do nothing, there_ no more giant pandas. A. will have B. will has C. will be D. will be going to have( ) 9. There_ elephants if we dont protect them. A. wont be any B
9、. will have no C. wont be some D. will be some( ) 10. - Do you want to go swimming this afternoon? -Yes, if the weather_ warm. A. will be B. would be C. was D. is翻译句子：1 If _(如果明天不下雨的话), we will go to the zoo.2 _(如果你生病了), you must see the doctor.3 Youll have to have a rest _（如果你感到累）4 _(如果我们训练海豚), the
10、y perform tricks.5 Parrots repeat words _ (如果你教他们)6 _(如果老虎住在野外), they will hunt for their own food .7 If you do not hurry up, _.(你会上学迟到).江苏13城市中考试题汇编1. If those wild animals cant find enough food, they _ (die) or have to leave their habitat soon. (2010无锡)( ) 2. A tourist will easily lose his way in
11、Beijing _ he has a map or guide. (2010镇江) A. if B. because C. unless D. when( ) 3. -Excuse me, could you take care of my little dog for me? -_. I _it if it doesnt rain after supper. (09镇江) A. Sorry; will walk B. My pleasure; will walk C. Im sure; walk D. Im afraid not; walk( ) 4. I have the key to t
12、he front door. My parents wont wait for me if I _ back late. (09徐州) A. come B. will come C. am coming D have come5. 如果明天下雨，我们就在家做作业。 (2010扬州)_Keys:相关练习动词填空：1. is, will walk 2. wont have, isnt 3. rains, will take 4. will hunt, live 5. are, will live 6. will die单项选择：15 D C C A B 610 D A C A D翻译句子：1. it doesnt rain tomorrow 2. If you are ill 3. if you feel tired 4. If we train dolphins 5. if you teach them6. If tigers live in the wild 7. you will be late for school江苏13城市中考试题汇编1. will die 2. C 3. B 4. A 5. If it rains tomorrow, we will do our homework at home.