It is a good example of a site that many people think _____ to change.
A.needB.to needC.needsD.needing
C
此題考查need的用法,還要理清句子結(jié)構(gòu)。that前是個主句,that引導(dǎo)的是個定語從句,其先行詞是a site,定語從句中謂語動詞應(yīng)該用單數(shù)needs,many people think是插入語,空格處是謂語部分。插入語經(jīng)常被出題人放在題目中,使句子復(fù)雜化,增加句子的難度,做題時可以把插入語去掉,便于理解句子結(jié)構(gòu)。
need既可用作情態(tài)動詞也可用作行為動詞,主要用法如下:
①作情態(tài)動詞時表示“需要;必須”,后面當(dāng)然跟動詞原形,僅用于否定句或疑問句中,否定式是needn’t,在肯定句中一般用must, have to, ought to或should代替,如:
You needn’t buy the book.
—Need I finish the work today?   —Yes, you must.
② 作行為動詞時,有時態(tài)、人稱和數(shù)的變化,后面跟to do,否定形式要用don’t/doesn’t/didn’t need,如:
He needs to finish it this evening.
③ need用作行為動詞時,后面還可以跟動名詞或名詞,此時含義跟need后面用不定式的含義不一樣。“need +動名詞”含有被動意義,類似這樣的用法還有有want, require,如:
Our classroom needs cleaning. =" Our" classroom needs to be cleaned.
既可用作情態(tài)動詞也可用作行為動詞的還有dare。
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