时间:2017-08-25 10:43:34
来源:网络 作者:May
impossible与possible用法比较
1. 在其系表结构后接不定式时,句子主语只能是形式主语it, 而不能是指人或指物的名词或代词等。如:
我们可能(不可能) 会赢得这场比赛。
正:It is possible (impossible) for us to win the match.
误:We are possible (impossible) to win the match.
若其后不定式与句子主语有动宾关系,则 impossible 则可以不用形式主语 it 而用名词作主语,但possible不能(或很少)这样用。如:
正:The match is impossible for us to win.
误:The match is possible for us to win.
2. 若 be possible (impossible) 后不接不定式或从句,则完全可以用“物”作主语。如:
Snow is possible, though not probable.
下雪是可能的,虽然不是很可能。
What he says is impossible.
他所说的是不可能的。
3. It's impossible that 从句中,从句通常要用虚拟语气,即从句谓语用“(should+)动词原形”;It's possible that 从句中,从句谓语要用陈述语气。如:
It's possible that he hasn't received the letter.
可能他还没收到那封信呢。
It is impossible that he (should) forget our meeting; he must have stayed away on purpose.
他不可能忘记我们的会议,他准是故意不来。