初二if条件句

1、If 引导的条件状语从句引导的条件状语从句（主现从现）（主现从现）If you heat it， snow turns into water.条件句表事实条件句表事实, 主句常用现在时主句常用现在时1. If you _ ice, it _into water. (heat/turn)2. A balloon _ if you _ a pin into it. (burst/stick)3. If you _ steam, it _ into water. (cool/turn)4. Metal _ if you _ it. (melt/heat)5. Wood _ if you _ it i

2、nto water. (float/put)6. A glass _ if you _it. (break/drop) heat melts put floats drop breaks turns bursts turns heat cool stick 1.主祈从现主祈从现 2.主情（主情（can，may，should，must）从现）从现 3.主将从现主将从现 if will/wont祈使句祈使句 + if条件状语从句条件状语从句 If条件状语从句条件状语从句，+ 祈使句祈使句if条件状语从句要用一般现在时。条件状语从句要用一般现在时。句型结构句型结构时态时态1.主祈从现主祈从现If y

3、ou want to get good marks,do what? Dont do what? If you want to get good marks, _. If you want to get good marks, dont _. study hard listen to teacher carefully. do homework by yourself. copy your homework. talk in the class cheat in the exams1.主祈从现主祈从现Complete the sentences with the correct form of

4、 the words.1.If you _(listen) to the music, _ (buy) a CD. 2. If he_ (be) late for school, _ (not wait ) for him.3. If you _ (buy) a new camera, _ (get) a good one. 4. If the light _ (not come) on, _ (wait) for one minute.isbuygetdoesnt comewaitdont wait listenbuy If you feel tired must .2.主情从现主情从现2.

5、主情从现主情从现（主将从现）（主将从现）If it is hot, we will go swimming.条件句表可能条件句表可能,主句多用将来时；主句多用将来时；Play a guessing game What will happen if I touch(触摸触摸) it?If you touch(碰）碰） it, it will _get angryWill it ? crydancesmileIf Im hungry,I will_. If Im tired, I will_. eat some foodhave a rest3.主将从现主将从现 If Im ill,_. I wi

6、ll see a doctorIf Im late,_.I will say sorry 3.主将从现主将从现 If it rains tomorrow,I_.will watch TV at homeIf it _ tomorrow,_.Ill play basketballdoesnt rainI wont_.play basketball if条件句不一般条件句不一般, 几个要点记心间。几个要点记心间。 条件句放在前条件句放在前, 逗号要放句中间。逗号要放句中间。 条件句条件句表表可能可能, 主句主句多用多用将来将来时；时； 条件句条件句表表事实事实, 主句主句常用常用现在现在时。时。

7、if条件句有特点条件句有特点, 现在时把将来替；现在时把将来替； 这个规则要牢记这个规则要牢记!if条件句歌诀条件句歌诀（一般现在时）（一般现在时）（一般将来时）（一般将来时）（一般现在时）（一般现在时）（一般将来时）（一般将来时）主将从现主将从现If you do it, you will be happy.Youll be happy if you do it.What will you do if youre happy? If Im happy, I will _. If Im happy, I will _. If Im happy, I will _. If Im happy, I

8、 will _.clap my handsstamp my feetwink my eyesnod my head1.If it rains tomorrow, we _ visit the museum. A dont do B wont go C arent go D didnt go.2 Will you go to the park if it _ fine? A will be B was C is D /3. If I _ too much TV, my mother will _.A watch, angry B watched, be angryC watch, be angr

9、y D will watch, be angryBCC4 If you _ to school late, your teacher _ angry with you.A come; are B come, will be C will come; are D will come; will be5 If you _ hard, you will _ successful. A work, are B works, is C to work, be D work, beBD用括号内所给词的正确形式填空1.Im sure if he _(go) to the party, he_ (have)

10、a great time.2.If the rain _(stop) tonight, we will go to the cinema.3.Ill buy a computer if I _(have) enough money.goes will have stopshave4.You _(not get) nervous if you _(do ) enough exercise.5.If she _ (be) kind to me , I _(not argue) with her.6.I want to know if he _(come) tomorrow, if he _(com

11、e), I _(give) the massage to him. 7.If you _(pay) more attention to that, he _(not get) injured. wont getdo iswont argue comes comes will give pay wont get1.Im sure if he _(go) to the party, he_ (have) a great time.2.If the rain _(stop) tonight, we will go to the cinema.3.Ill buy a computer if I _(h

12、ave) enough money.4.You _(not get) nervous if you _(do ) enough exercise.6.I want to know if he _(come) tomorrow, if he _(come), I _(give) the massage to him. goes will have stopshave wont getdo comes will come will give1. If he_ (feel) well, he _ (go) to work tomorrow.2. If my mother _(have) time,

13、she _ (take) me to the museum.3. If it _ (not rain) tomorrow, they _(go) for an outing.4. If they _ (be) free, they _ (play) a football match.5. If it _ (rain), we _ (not go) out.6. If he _ (not work) hard, he _ (fail) in the exam.7. If he _(not have) time, he _ (not go) to the museum. feels will go

14、 has will take doesnt rain will go are will playrains wont go doesnt work will fail doesnt have wont goIf you dont leave now, you will be late for schoolUnless you leave now, you will be late for school.if not unless 1.You improve your handwriting/ you will lose marks in the exam If you dont improve

15、 your handwriting, Unless you improve your handwriting, 1.You improve your handwriting/ you will lose marks in the exam If you dont improve your handwriting, you will lose marks in the exam.2. you will have toothache/ you clean your teeth If you dont clean your teeth,Unless you clean your teeth, you

16、 will have toothache.3.this room will get very hot / you put the air conditioning on soonIf you dont put the air conditioning on soon,Unless you put the air conditioning on soon, this room will get very hot.4. you keep ice-cream in a fridge/it meltsIf you dont keep ice-cream in a fridge,Unless you k

17、eep ice-cream in a fridge, it melts.总总 结结1、主现从现、主现从现 (条件句表事实条件句表事实) If you heat it, snow turns into water.2、主将从祈、主将从祈 If you want to get good marks, study hard.3、主情（、主情（can,may,should,must）从现）从现 If you feel tired must .4、主将从现、主将从现 (条件句表可能条件句表可能) if will/wont If it is hot, we will go swimming.If you

18、dont clean your teeth, you will have toothache.Unless you clean your teeth, you will have toothache.If he _ back, please let me know.Do you know if he_ back next week? comecomeswill comeIf If 在条件状语从句中在条件状语从句中表示如果，在谓语动词表示如果，在谓语动词之后引导宾语从句表示之后引导宾语从句表示是否，相当于是否，相当于whetherwhether。if的用法的用法2.引导条件状语从句：引导条件状语从句：译为译为“如果，假如如果，假如”(1) if从句从句+祈使句祈使句(2) if从句从句+主句（一般将来时）主句（一般将来时）1.引导宾语从句引导宾语从句：“是否是否”，表不确定的概念。，表不确定的概念。I dont know if your father can come together . Can you tell me if miss your parents ?e.g. If I were you , I would invite him to the party .如果我是你，我会邀请他参加聚会。如果我是你，我会邀请他参加聚会。If he had