我原来以为可以,查了一下语法书,不行.
"It is"的contraction (缩约形式)是"it's"：
It's raining now.(= It is raining.)
"It has"的缩写形式也是"it's"：
It's been raining for two hours.(= It has been raining for two hours .)
那么"it was"的缩写形式是什么呢?
在古代英文里,"it was"可 以被缩写成"'twas"：
'Twas raining.(= It was raining.)
'Twas thy love that brought us together.(= It was your love that brought us together.)
但在现代英文里,"it was"并没有缩写形式；"'twas"这个字已被淘汰了.
换句话说,"it's"可以是"it is"或"it has",但不能是"it was".