1、Unit5 語法專項課件 （why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(gòu)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(dǎo)的特殊疑問句，一般由because引導(dǎo)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.,Why do they w

2、ant 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(fù)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的用法4,What do you

3、 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?；卮饂hy引導(dǎo)的疑問句；as，since語氣較弱，不回答why引導(dǎo)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 for school because

4、 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(jīng)常步行上班？他說，那對他身體好。答句表示的是原因，故應(yīng)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