if条件状语从句.ppt

AdverbialClauseofCondition if引导的条件状语从句 -----------复习课 第一页，编辑于星期三：一点 三分。 If you are happy, what will you do? If I am happy, I will smile. 第二页，编辑于星期三：一点 三分。 If you become sad, what will you do? If I become sad, I will cry. 第三页，编辑于星期三：一点 三分。 She is doing her homework. If you are hard-working, you will get good grades. She gets good grades. 第四页，编辑于星期三：一点 三分。 If you play computer games on weekdays , you’ll be very tired in class your parents will be sad. you won’t get good grades. your eyes will be poor 第五页，编辑于星期三：一点 三分。 She will be late. If she _____ to school, she _____ ___late. She is going to walk to school. walks will be Lead-in 第六页，编辑于星期三：一点 三分。 1) 条件状语从句通常由if或unless(=if not)引导，从句中常用一般时代替将来时，即if或unless后的句子谓语用一般现在时。但是，主句则通常用将来时，情态动词或祈使句。 时态－－主将从现 主句一般将来时， 从句一般现在时 第七页，编辑于星期三：一点 三分。 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. 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. if条件状语从句结构及时态 Revision 第八页，编辑于星期三：一点 三分。 If 引导条状语从句时，从句中用一般现在时代替一般将来时。 1. If he ______(go) to the movies,he won’t finish his work. goes 2. If I ________(become) a doctor,I can help others. become 3. If we _______(have )time, we will go to the park tomorrow. have 4.如果你去， 我也去。 If you go,I will go. 5.如果明天下雨，请带雨衣。 raincoat Please take a raincoat if it rains. excellent 第九页，编辑于星期三：一点 三分。 If you are free this weekend, what will you do ? If I am free ,… sleep watch TV play computer games practice 第十页，编辑于星期三：一点 三分。 If you want to get good marks,do what? Don’t do what? If you want to get good marks, __________. If you want to get good marks, don’t __________. study hard listen to teachers carefu