Unit 5 语法课件 2023-2024学年人教版七年级英语下册

Unit5 语法专项课件 （why的用法） 初中英语人教版七年级下册 why是疑问副词，意思是“为什么”，用来询问原因、理由，一般由“Why + 一般疑问句”构成特殊疑问句。 Why does he like this subject? Why is she here? why引导的特殊疑问句，一般由because引导的状语从句来作答。because是连词，意为“因为”，其后要接一个句子来陈述原因、理由。 —Why don’t you like English? —Because it’s difficult. —Why do they want to go to China? —Because they want to learn Chinese. Why not do sth？=Why don’t/didn’t you do sth? 意为“为什么不做某事？”，用于提出建议、征询意见。根据具体场景来答复对方。 —Why don’t you go to the zoo with us? — Sounds great./Good idea. why相当于“what…for”，回答时用because后接表示原因的句子，because of后接名词、代词或词组。 —What do you open the window for? = Why do you open the window? —Because we need more fresh air. because常回答why引导的疑问句；as，since语气较弱，不回答why引导的问句。 —Why are you late again? —Because there is something wrong with my bike. because和because of有区别。because后面要跟从句，而because of后面跟名词、代词或短语。 He is late for school because it rains heavily. He is late for school because of the heavy rain. 【典例1】—______ does your cousin usually go to work on foot? —He says it’s good for his health. A. Where B. When C. Why D. How 考查疑问词。句意：—为什么你堂弟经常步行上班？—他说，那对他身体好。答句表示的是原因，故应选用why来提问。 【典例2】—Why not ______ to the park now? —Good idea! Let’s go. A. go B. to go C. goes D. going 考查why的用法。句意：为什么现在不去公园呢？好主意，我们走。why not表建议，后跟省to动词不定式，选A。 【典例3】—Why not go to Lao She Teahouse tonight? —______. A. It doesn’t matter B. Thank you C. Sorry to hear that D. Sounds great 考查疑问句及回答。句意：—为什么今晚不去老舍茶馆呢？—听起来不错呀。表建议的回答，根据实际情况来，选D。 一、知识点梳理 特殊疑问句的构成及用法 （1）它的结构一般为：特殊疑问词+一般疑问句，即：特殊疑问词+be/助动词/情态动词+主语+谓语/表语+(其他)，如： What can be done about it？ 对此能做些什么呢？ Which are yours？哪些是你的？ Who would like to come for a game of football？谁愿意来踢场足球呀？ What did you say？你说什么？ Why didn’t you tell me？ 你为什么没有告诉我？ (2) 特殊疑问句有时可有一个以上的疑问词，如： When and where did you meet？你们何时在何地相遇的？ 1. --______ is your father? Does he still work as an engin