有這樣一道題：“Our team is _________ to win the match.” “Really? But I don’t think so.”
A. easy B. difficult C. possible D. sure
此題正確答案為D。而A、B、C三項填入空格處雖然從漢語來看說得通，但不合英語習慣。因為按英語習慣，easy 和difficult 後接不定式時，其主語(或邏輯主語)通常應是 it，而不能是具體的人或物，除非這個主語與其後不定式有動賓關係。如：他回答案這個問題很容易。誤：He’s very easy to answer this quesiton. 正：It is very easy for her to answer this quesiton. (用形式主語 it 作主語)正：The question is very easy for her to answer. (主語為具體的事物，但它與其後不定式有動賓關係，即 to answer this quesiton)我們很難在半小時內完成這工作。誤：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. (用形式主語 it 作主語)對possible 來說，後接不定式時，其主語只能是 it，不能是具體的.人或事物，即使該主語與其後的不定式有動賓關係也不可以。如：我們可能會贏得這場比賽。誤：We are possible to win the match.誤：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.
【小結】英語習慣上不能說：sb is difficult to do sth / sb is easy to do sth要表示類似意思可考慮使用：It’s difficult for sb to do sth / It’s easy for sb to do sth
