英語七年級下冊Unit5-語法專項課件(why的用法)(新人教版)

1、Unit5 語法專項課件語法專項課件 （why的用法）的用法） 初中英語人教版七年級下冊 why的用法1 why是疑問副詞，意思是“為什么”，用來詢問原因、 理由，一般由“Why + 一般疑問句”構成特殊疑問句。 why的用法1 Why does he like this subject? Why is she here? why的用法2 why引導的特殊疑問句，一般由because引導的狀語從 句來作答。because是連詞，意為“因為”，其后要 接一個句子來陳述原因、理由。 why的用法2 Why dont you like English? Because its difficult.

2、Why do they want to go to China? Because they want to learn Chinese. why的用法3 Why not do sth？=Why dont/didnt you do sth? 意為“為什么不做某事？”，用于提出建議、 征詢意見。根據(jù)具體場景來答復對方。 why的用法3 Why dont you go to the zoo with us? Sounds great./Good idea. why的用法4 why相當于“whatfor”，回答時用because后接表示 原因的句子，because of后接名詞、代詞或詞組。 why的

3、用法4 What do you open the window for? = Why do you open the window? Because we need more fresh air. 易錯點1 Why are you late again? Because there is something wrong with my bike. because常回答why引導的疑問句；as，since語氣較弱， 不回答why引導的問句。 易錯點2 because和because of有區(qū)別。because后面要跟從 句，而because of后面跟名詞、代詞或短語。 He is late f

4、or 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 its good for his health. A. Where B. When C. Why D. How 考查疑問詞。句意：為什么你堂弟經常步行上 班？他說，那對他身體好。答句表示的是原因， 故應選用why來提問。 【典例2】Why not _ to the park now? Good idea! Lets go. A. go B. to go C. goes D. going 考查why的用法。句意：為什么現(xiàn)在不去公園呢？ 好主意，我們走。why not表建議，后跟省to動詞不 定式，選A。 【典例3】Why not go to Lao She Teahouse tonight? _. A. It doesnt matter B. Thank you C. Sorry to hear