1、If 引导的条件状语从句If 引导的条件状语从句遵循主过从过、主将从现的原则。主将从现（主情从现、主祈从现）If it rains tomorrow,I wont climb the hills.If it doesnt rain tomorrow,I will go to the countryside with my friends.If 引导的条件状语从句If 引导的条件状语从句遵循主过从过、主将从现的原则。主将从现（主情从现、主祈从现）If you will help me,Ill finish it on time.We may go out if its fine tomorrow
2、.If you finish your homework,you can watch TV.Please call me if you go shopping next Sunday.If I go there，Ill take her some flowers. Well stay at home if it rains tomorrow.Please call me if hes at home.If you work harder,youll pass the exam.She will visit her grandpa if she has time tomorrow.Well ta
3、ke a taxi to the city if the train doesnt arrive on time.The teacher will be angry if he is late.If 引导的条件状语从句与 unless 引导的条件状语从句的转换If+否定形式=unless+肯定形式You wont pass the exam if you dont work hard.=You wont pass the exam unless you work hard.If you dont go to bed earlier,you will feel tired in the morn
4、ing.=Unless you go to bed earlier,you will feel tired in the morning.If it doesnt rain,he will play with me tomorrow.=Unless it rains,he will play with me tomorrow.If she doesnt come,Ill go shopping alone=Unless she comes,Ill go shopping alone.if 条件状语从句与祈使句,and/or一般将来时的句子转化If you get up early,youll
5、get there on time.=Get up early,and youll get there on time.=Get up early,or you wont get there on time.If you get up early，you wont be late for school.=Get up early，and you wont be late for school.=Get up early，or you will be late for school.If you dont get up early,you wont catch up with the early
6、 bus.=Get up early,and you will catch up with the early bus.=Get up early,or you wont catch up with the early bus.if 条件状语从句与 without 的句子转化If there is no water,we cant live.=We cant live without water.If there is no water,fish will die.=Fish will die without water.If you help me,Ill finish the work s
7、oon.=With your help,I finish the work soon.if 条件状语从句与祈使句,and/or一般将来时的句子转化If you get up early,youll get there on time.=Get up early,and youll get there on time.=Get up early,or you wont get there on time.If you get up early，you wont be late for school.=Get up early，and you wont be late for school.=Ge
8、t up early，or you will be late for school.If you dont get up early,you wont catch up with the early bus.=Get up early,and you will catch up with the early bus.=Get up early,or you wont catch up with the early bus.1. your friend ,Ill tell you.A.come B.will come C.comes D.are coming2. If you go to col
9、lege，you a good education.A.will get B.get C.gets D.got3.I want to know if they tomorrow.A.come B.will come C comes D.came4.Take enough exercise, youll be in good heath.A.or B.so C.but D.and5.If it (not rain),he (play)basketball with me tomorrow.6.If Uncle Lan _(come),I_(call)you up.7.She must see a
10、 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 dont be quick,you (be)late.1.We wont wait for you you cant arrive on time.A.until B.when C.after D.if2.The children will go to the zoo if it (not rain)this Saturday.3.If she work hard,s
11、he be able to go to colleage.A.not,not B.wont,wont C.wont,doesnt D.dpesnt,wont4.If I run every day,I (be)healthier.5.If it (not rain),he (play)with me tomorrow.6.She must see a dentist if she (have)a toothache.7.Study hard,or you (not pass)the test.8.If you (not go)to bed earlier,you will feel tired in the morning.9.If he (be)free tomorrow,he will come to your birthday party.10.We will go to the zoo if it (not snow)tomorrow.11.If it is fine tomorrow,I (go)for a filed trip.
