新概念英语第一册第137-138课详解.ppt

* 本资料来自于资源最齐全的２１世纪教育网 * 本资料来自于资源最齐全的２１世纪教育网 * 本资料来自于资源最齐全的２１世纪教育网 * 本资料来自于资源最齐全的２１世纪教育网 If条件句：条件句用于陈述语气，表示假设的情况可能发生， 其中 if 是“如果”的意思。 主句一般将来时 ，从句用一般现在时。 构　　成 条件从句 主　　句 时　　态 If＋一般现在时 主语＋shall/will+动词原形 例　　句 If he comes, he will take us to the zoo. 用法： 1. 如果主句是一般将来时，从句则用一般现在时。 If it rains（从句）， I will stay at home. I’ll go with you if you don’t want to go alone（从句）. 2.如果主句含有must, may, can 等情态动词，从句也要用 一般现在时。 If you drive too fast, you may have an accident. You must stop if the traffic is red. If you finish the homework， you can go home． 如果你作业做完了就可以回家了。 If you want to lose weight you must/should eat less bread. 如果你想减肥，你必须少吃面包。 3. 如果主句是祈使句，从句同样要用一般现在时。 Don’t go and play football if you don’t finish your homework. Please call me if he comes next Sunday. 主将从现，主情从现，主祈从现 练一练： 1。如果她早点儿起床，就有时间在家里吃早餐 If she____ ____a little earlier, she’ll have time to eat breakfast at home. 2。如果你参加聚会，你将会过得很开心。 If you____ the party ,you_____ ____ a great time. 3。如果明天下雨，我们将不去野餐 If it ____tomorrow, we ___ ____ for a picnic. 4。如果你经常听英文歌，你将会喜欢英语 If you often ____ ___English songs, you___ ___English. gets up join will have rains won’t go listen to will like 1.If he____________ (not, do it ), I___________(do) it. 2.If you ____ (be) late for school ,my teacher ________(be) angry. are will be 3 If she________ (win) the prize ,we _______(be) happy. wins will be 4.If I _________ (not,eat )so much ,I _________(get) thinner. 5.If you ______(tell) them, they _____________ (not,believe) you. don’t eat will get tell won’t believe 6 I _________(stay) at home,If it __________( rain). 7.If it ____________(not,rain) ,I _________( go) out. 8. we __________(play) football, If it is _________(sun) . 9.If she __________(become) a star ,her parents ____________ (not,send) her away