初中英语语法——If引导的条件状语从句(讲解及练习).doc

初中英语语法——If引导的条件状语从句(讲解及练习) 初中英语语法——If引导的条件状语从句(讲解及练习) PAGE / NUMPAGES 初中英语语法——If引导的条件状语从句(讲解及练习) 初中英语――条件状语从句（解说 练习） Ⅰ条件状语从句的定义 Ⅱ条件状语从句的指引词 1.if 指引的条件状语从句 表示在某种条件下某事很可能发生。 If we pay much attention to the earth, well have a better world. 假如我们多关爱地球，就会拥有一个更美好的世界 If it rains tomorrow, what shall we do? 假如明日下雨，我们怎么办？ 注意： if 还能够指引虚构条件句，表示不行实现的条件，从句中多用一般过去时或过去达成时。 What would happen if there were no water ? 假如没有水会如何？ 2.unless 指引的条件状语从句 unless 的意思是假如不，除非。可与 if...not 交换。 You will fail in English unless you work hard. 你英语考试会不及格的，除非你更为努力。 3.as /so long as 指引的条件状语从句 as /so long as 意思是 “只需 ” So long as youre happy,i will be happy. 只需你快乐，我就快乐。 Ⅲ条件状语从句的种类 Ⅳ条件状语从句的时态原则 条件句 从句 主句 一般未来时 真切 一般此刻时 神态动词 +动原 祈使句 一般过去时 非真切 would/could+ 动原 be 动词用（ were ） 注意 ： 学习 if 指引的条件状语从句的用法 ,此刻总结一下 : if 条件句不一般 ,几个重点记心间 ; 条件句 ,放在前 , 逗号要放句中间。 条件句表真切，主将从现要遵照； 条件句非真切，虚构语气用到位。 优选 练习 Ⅰ .单项选择 （ ） 1.If you _____ to the party, you ’ll have a great time. A. will go B. went C. go D. going （ ） 2. I ____ her the answer if she ____me. A. can tell, will ask B. will tell, will ask C. would tell, ask D. will tell, asks （ ） 3. –What are you going to do tomorrow? --We’ ll go to the library tomorrow if it ___. A. isn ’ t rain B. rain C. won ’ t rain D. doesn ’ t rain （ ） 4. What will you do i f you _____ to the old folk ’s home? A. go B. went C. going D. will go （ ） 5． I ’ll give the book to him if he ___ here next Sunday. A. will come B. comes C. is coming D. came Ⅱ .用所给词的适合形式填空 6..If you ________(feel) tired, you _______________ (have) to have a rest. Where _______ he _________(see) the film if he ________________(have) time? If there __________(be) fewer trees, there _______________( be) more pollution. If Marcia _____________(live) alone, she ___________________( keep) a pet parrot. Lana ________________( buy) a new dress if the old one ____________(be) out of style. 12.The twins ______________(fight) if they_______________(argue). I ____________(have) a bake sale if I _____________(need) money for education. Pete