请看下面的句子,答案是哪个?原因是什么?

He is __________ to win the match.

A. possible B. difficult C. sure D. easy

此题应选C。其余几项不能选为答案,是因为它们在通常情况下,easy, difficulty, possible, impossible, necessary 等形容词后接不定式时,通常不以人作主语。请再看实例:

他可能会赢得这场比赛。

误:He is possible to win the match.

正:It is possible for him to win the match.

我很难按时完成它。

误:I’m difficult to finish it in time.

正:It’s difficult for me to finish it in time.

他可以轻而易举地把它干好。

误:He’s easy to do it well.

正:It’s easy for him to do it well.

他不可能成功。

误:He is impossible to succeed.

正:It is impossible for him to succeed.

他有必要买台电脑。

误:He is necessary to buy a computer.

正:It is necessary for him to buy a computer.

对于以上结构,有些形容词有时也可用人作主语,但要注意,此时这个主语必须是其后不定式的逻辑宾语。如:

他很容易(难)相处。

正:He’s easy (difficult) to get along with.

正:It’s easy (difficult) to get along with him.

不用“人”作主语的句型习惯用法解析