We need _________ more exercises every day.

A. to do      B. doing         C. do

 

【答案】

A

【解析】此題考查動詞need的用法。“需要”need 的用法 一、作情態(tài)動詞 1．need作情態(tài)動詞無人稱或數(shù)的變化， 后接動詞原形，多用于否定句和疑問句中。如：You needn't worry.你不必?fù)?dān)心。 2．由need引出的一般疑問句，肯定回答常用must或have to;否定答語常用needn't. 如： —Need I answer the question? 我需要回答那個問題嗎？ —Yes, you must. /Yes, you have to.是的，你必須回答。/是的，你得回答。/No, you needn't.不，不必了。 3．由must引出的一般疑問句，肯定回答用must,否定答語用needn't或don't have to。如： —Must I do the work now? 我必須現(xiàn)在干這個活嗎？ —Yes, you must /have to.是的，你必須做。/No, you needn't /don't have to. 不，你現(xiàn)在不必做。 二、作行為動詞 need 作為行為動詞有人稱和數(shù)的變化， 后面可接名詞、代詞、動名詞及帶to 的動詞不定式；可用于肯定句、疑問句和否定句中，如：She needs help.她需要幫助。I don't need to see the doctor.我不需要看病。—Do you need to go at once? 你需要馬上走嗎？ —Yes, I do.是的，我得馬上去。 —No, I don't.不，不用馬上走。Need后跟動名詞時表示被動意義相當(dāng)于need to be done。

 

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