新概念英语第一册 Lesson137-138语法点归纳学案（含练习答案）

中小学教育资源及组卷应用平台 新概念英语第一册 语法点总结 Lesson137-138 语法点总结： if 引导的真实条件从句 条件状语从句包括【真实条件句】和【非真实条件句】。真实条件从句表示可以实现的条件,多由if引导,if的意思为“如果”、“假如”。 真实条件状语从句表示“将来有可能发生的动作或存在的状态”。 时态(主将从现)： 主句 从句 例句 主将从现 一般将来时 一般现在时 I‘ll start the project if you all agree. 如果你们都同意，我会启动这个项目。 主情从现 主句通常带有 can, may, must, might，will,won’t等情态动词,预示条件实现后会发生的情境 一般现在时 If it snows, we can ski. 如果下雪，我们可以滑雪。 If the traffic lights are at red, a driver must pull up. 如果交通信号灯是红灯,司机必须停车。 If it rains tomorrow, we won't go there. 如果明天下雨,我们就不去那里了。 主祈从现 祈使句 一般现在时 Please tell me if you want to go. 如果你想去，请告诉我 专项练习： 一、单项选择：请从下列选项中选出正确的选项。 1. You are sure to pass the exam_____you study hard. A. if B. though C. that 2. I'll go to see the film with you_____I have time this evening. A. whether B. so C. if 3. We'll stay at home if it_____this afternoon. A. rain B. rains C. to rain 4. Maybe you_____if you make some bad friends. A. go wrong B. will go wrong C. going wrong 5. If you_____early, you will catch the bus. A. get up B. getting up C. to get up 6. Difficulties are nothing if we_____not afraid of them. A. will B. shall C. are 7. If you_____to hang up, please press the red button. A. want B. wanted C. wanting 8. I could come earlier_____. A. if necessary B. if any C. if not 二、用括号内所给单词的正确形式填空。 1. She will get very upset if I_____(exclude) her from anything. 2. We'll stay at home if it_____(rain). 3. Plastic will melt if it_____(get) too hot. 4. If you_____(will) wait just for a moment, I'll try to find your papers. 5. If you won't arrive at the airport in time, please_____(call) me. 6. If the traffic lights are at red, a driver _____(must) pull up. 7. If we _____(catch) the 10 o’clock train, we may get there by lunch time. 答案： 1. 1-5 ACBBA 6-8 CAA 2. exclude, rains, gets, will, call, must, catch