a way of saying or writing ‘it would’ . This is not usually used in formal writing （it would 的一种说法或写法，不常用于正式文体中）
I thought it’ d be better to wait until later. 我认为最好是再等等。
2
a way of saying or writing ‘it had’ when ‘have’ is used as an auxiliary verb . This is not usually used in formal writing （have 用作助动词时it had 的一种说法或写法，不常用于正式文体中）
It’ d been twenty-four hours since she had last eaten. 自从她上次进食后，已经有24个小时了。