条件状语从句公开课课件课本.ppt

Part1:If 的用法 If it is sunny this weekend, what will you do ? If it is sunny this weekend, what won’t you do ? If you have a picnic at weekends,what will you buy? If________,______________. If dog bites you, what should you do? 分析试题特点及做题思路： Part2:Unless的用法 首字母填空（连词）做题思路： 1. 找出关键词汇 2.判断主从句的关系 3.选择正确的连词 Homework: 1.复习连词的用法 2.做卷子上剩余的练习 * Grammar What will I do if it is sunny this weekend? 1.I want to know if he will go to park with us. 2. We will have a picnic if it doesn’t rain. 3. If you boil water, it becomes steam. 4. If you feel tired, you must have a rest. 宾语从句 条件状语从句 语法1：if作为宾语从句的引导词，引导宾语从句。（是否） 语法2：if（如果）引导的条件状语从句 ? if 用于宾语从句中 原句式 引导词 从句语序 一般 疑问句 whether /if 改为陈述句 语序 由从属连词whether, if 引导的宾语从句 e.g. 1. I want to know __________________________________. （他是否跟我们一起去公园） 2. Ask him _____________________. （他是否能来） 3. I didn’t know ___________________________.（是否要下雨） if (whether) he will go to the park with us whether (if) he can come whether it was going to rain or not 当句末为or not时，引导词只能用whether而不能用if. If 与whether 的区别 I don’t know _____ he will come or not. I don’t care of ______ he is handsome. He wondered ______ to stay here the next week. ____ he will come is not decided. 与or not 连用只能用whether 介词后只能用whether 与to do 不定式连用只能用whether 作主语只能用whether If 引导条件状语从句 If it is sunny this weekend, I __________ football with my classmates. If it is sunny this weekend, I__________. will play If it is sunny this weekend, I _________________