1、If引導的條件狀語從句If引導的條件狀語從句遵循主過從過、主將從現的原則。主將從現（主情從現、主祈從現）If it rains tomorrowwon' t climb the hills.If it doesn' rtain tomorrowwill go to the countryside with my friends If引導的條件狀語從句If引導的條件狀語從句遵循主過從過、主將從現的原則。主將從現（主情從現、主祈從現）If you will help me,I'll finish it on time We may go out if it's fi

2、ne tomorr ow.If you finish your homework,you can watch TVPlease call me if you go shopping next Sunda y.If I go there, I'II take her some flowers.We'll stay at homeif it rai ns tomorrow.Please call meif he' s at home.If you work harder,you ' ll pass the exam.She will visit her gran d

3、pa if she has time tomorrow.We ll take a taxi to the cityf the train doesn ' t arrive on time.The teacher will be an gryif he is late.If引導的條件狀語從句與unless引導的條件狀語從句 的轉換If+否定形式=unless+肯定形式You won ' t pass the exfyou don' Work hard.二You won ' t pass the examlessyou work hard.If you don

4、9; go to bed earlier,you will feel tired in the morning. 二Unlessyou go to bed earlier,you will feel tired in the morning.If it doesn' rain,he will play with me tomorrow.=Unlessit rain s,he will play with me tomorrow.If shedoesn' Ctome,I ' ll go shopping alone二Uni ess she comes,I' ll

5、go shopp ing alone.if條件狀語從句與祈使句，and/or +般將來時的句子轉化If you get up early,you' ll get there on time.=Get up early,and you ' ll get there on time.=Get up early,or you won ' t get there on time.If you get up early, you won't be late for school.=Get up early, and you won't be late for sc

6、hool.=Get up early, or you will be late for school.If you don ' t get up early,you worich up With the early bus.=Get up early,and you will catch up with the early bus =Get up early,or you won ' t catch up with the early busif條件狀語從句與without的句子轉化If there is no water,we can't live.=We can&#

7、39;t live without water.If there is no water,fish will die.二Fish will die without water.If you help me,I ' ll finish the work soon.二With your helpfinish the work soon.if條件狀語從句與祈使句，and/or +般將來時的句子轉化If you get up early,you' ll get there on time.=Get up early,and you ' ll get there on time.

8、=Get up early,cr you won ' t get there on time.If you get up early, you won't be late for school.=Get up early, and you won't be late for school.=Get up early, or you will be late for school.If you don ' t get up early,you won ' t catch up with the early bus.=Get up early,and you

9、 will catch up with the early bus =Get up early,or you won ' t catch up with the early bus1 your friend,I'll tell you.A. comeB will come C comes D are coming2. If you go to college youa good educationAwill get B.getC. getsD. got3.I want to know if theytomorrow.A. comeB. will come C comes D.

10、came4. Take enough exercise,you'll be in good heath.A.or B.so C.but D.and5.If it(not rain),he(play)basketball withme tomorrow.6lf Uncle Lan(come),l(call)you up.7. She must see a dentist if she(have)a toothache.8. Please wake me up if he(come)back.9. Hurry up ! Or you(be)late again.10.If you don

11、' t bekquiu(be)late.1. We won ' t wait for youyou can ' t arrive on time.A.u ntilB.whe nC.after D.if2. The childre n will go to the zoo if it(not rain) this Saturday.3f shework hard,sh be able to go to colleage.A.not,notB.won ' t,won 'C.twon' t,doesn 'Dtdpesn ' t,won 't4f I run every day,I(be)healthier.5.lf it(not rain),he(play)with metomorrow.6.She must see a den tist if she(have)a toothache.7.Study hard,or you(not pass)the test.8.If you(not go)to bed earlier,you will