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初中英語人教版七年級下冊why的用法1why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(gòu)成特殊疑問句。why的用法1Why does he like this subject?Why is she here?why的用法2why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2Why dont you like English?Because its difficult.Why

2、do they want to go to China?Because they want to learn Chinese.why的用法3Why 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3Why dont you go to the zoo with us? Sounds great./Good idea.why的用法4why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的用法4What do you

3、open the window for?= Why do you open the window?Because we need more fresh air.易錯點1Why are you late again?Because there is something wrong with my bike.because?；卮饂hy引導的疑問句；as，since語氣較弱，不回答why引導的問句。易錯點2because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 for school because it rains

4、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(jīng)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?！镜淅?】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?！镜淅?】Why not go to Lao She Teahouse tonight? _. A. It doesnt matter B. Thank you C. Sorry to hear