精英家教网 > 高中英语 > 题目详情
It is a good example of a site that many people think _____ to change.
A.needB.to needC.needsD.needing
C
此题考查need的用法,还要理清句子结构。that前是个主句,that引导的是个定语从句,其先行词是a site,定语从句中谓语动词应该用单数needs,many people think是插入语,空格处是谓语部分。插入语经常被出题人放在题目中,使句子复杂化,增加句子的难度,做题时可以把插入语去掉,便于理解句子结构。
need既可用作情态动词也可用作行为动词,主要用法如下:
①作情态动词时表示“需要;必须”,后面当然跟动词原形,仅用于否定句或疑问句中,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 作行为动词时,有时态、人称和数的变化,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用作行为动词时,后面还可以跟动名词或名词,此时含义跟need后面用不定式的含义不一样。“need +动名词”含有被动意义,类似这样的用法还有有want, require,如:
Our classroom needs cleaning. =" Our" classroom needs to be cleaned.
既可用作情态动词也可用作行为动词的还有dare。
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