ID: 21781476

Unit6 Travelling around Asia Grammar 同步学案(含答案)沪教版(2024) 七年级上册

日期:2024-11-22 科目:英语 类型:初中学案 查看:63次 大小:23702B 来源:二一课件通
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沪教版2024 七年级上册 Unit 6 Travelling around Asia 第二课时 Grammar 单元语法精讲 if 条件状语从句的用法   条件状语从句通常由连词if引导,意为“如果;假如”,表示在某种条件下,很可能会发生某种事情。 1. if 条件状语从句的位置 在if引导的条件状语从句中,if条件句位置灵活,可直接放在主句后面;若if条件句放在句首,从句后面要加逗号和主句隔开。如: If I have time tomorrow, I’ll go to the countryside. 从句         主句 =I’ll go to the countryside if I have time tomorrow. 主句      从句 2. if 条件状语从句的时态搭配 (1)主句的谓语用一般将来时,从句的谓语用一般现在时(即:主将从现)。 I will let you know if he comes back. 如果他回来,我会让你知道的。 We will go if the weather stays fine. 如果天气一直好,我们就去。 (2)主句的谓语动词含有情态动词时,if从句用一般现在时(即:主情从现)。 If you visit People’s Square, you can also see famous buildings around it. 如果你去参观人民广场,你还能在它周围看到很多著名的建筑。 You must start now if you don’t want to be late. 如果你不想迟到,你必须现在出发。 (3)主句是祈使句时,if从句用一般现在时(即:主祈从现)。 Work hard if you want to get a good mark! 如果你想取得好成绩,努力学习吧! If you want to listen to music, buy a CD! 如果你想听音乐,买张CD吧! 3. if引导的条件状语从句与if引导的宾语从句的区别 if引导的条件状语从句中if意为“如果”,主句用一般将来时,从句则用一般现在时;if引导宾语从句时,if意为“是否”,相当于whether,时态需根据语境确定。 I don’t know if it will rain tomorrow. 我不知道明天是否会下雨。 if 条件状语从句用法歌诀:if条件句不一般,几个要点记心间;条件句,放在前,逗号要放句中间。条件句,表可能,主句多用将来时;条件句,表事实,主句常用现在时。 4. if 条件状语从句与其他句式的转换 (1)借助“祈使句+and/or+陈述句”来转换。 If you get up early, you’ll get there on time. =Get up early, and you’ll get there on time. =Get up early, or you won’t get there on time.早点起床, 你就会准时到那里。 注意:and 在句意上表示顺承关系; or 表示转折关系。 (2)借助介词 without 或 with 来转换。 If there is no water, fish will die. = Fish will die without water. 如果没有水,鱼就会死。 If you help me, I can finish the work soon. = With your help, I can finish the work soon. 如果你帮助我,我能够快点完成工作。 基础练习·课时过关 一、 用括号内所给单词的适当形式填空。 1. If he _____(eat) less meat, he _____(be) healthier. 2. We _____(go) shopping if it _____(stop) raining. 3. He _____(come) if you _____(invite) him. 4. If there _____(be) snow, the children _____(go) out and make snowmen. 5. If you _____(go) to bed early, you _____(not feel) tired in the morning. 6. If you _____(ask) him, he _____(tell) you. 7. I _____(visit) the Great Wall if it _____(not rain) next Sunday. 8. If you _____(use) your head, you _____(find)a way. 9. Tomorrow is Ann’s birthday. If you _____(buy)her a book, she _____(be) very happy. 10. If you _____(read) it aloud, the class_____(hear) you. 二、 单项选择。 ( ) 1. Mary will go to Sanya if she _____ a five-day trip. A. have B. had C. will have D. has ( ) 2. What will you do if you _____ to the ... ...

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