有这样一道题：“Our team is _________ to win the match.” “Really? But I don’t think so.”
A. easy B. difficult C. possible D. sure
此题正确答案为D。而A、B、C三项填入空格处虽然从汉语来看说得通，但不合英语习惯。因为按英语习惯，easy 和difficult 后接不定式时，其主语(或逻辑主语)通常应是 it，而不能是具体的人或物，除非这个主语与其后不定式有动宾关系。如：他回答案这个问题很容易。误：He’s very easy to answer this quesiton. 正：It is very easy for her to answer this quesiton. (用形式主语 it 作主语)正：The question is very easy for her to answer. (主语为具体的事物，但它与其后不定式有动宾关系，即 to answer this quesiton)我们很难在半小时内完成这工作。误：We are very difficult to finish the work in half an hour.正：It is very difficult for us to finish the work in half an hour. (用形式主语 it 作主语)对possible 来说，后接不定式时，其主语只能是 it，不能是具体的.人或事物，即使该主语与其后的不定式有动宾关系也不可以。如：我们可能会赢得这场比赛。误：We are possible to win the match.误：The match is possible for us to win.正：It is possible that we will win the match.
正：It is possible for us to win the match.
【小结】英语习惯上不能说：sb is difficult to do sth / sb is easy to do sth要表示类似意思可考虑使用：It’s difficult for sb to do sth / It’s easy for sb to do sth
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