would rather sb did和would rather sb do的区别：
1、would rather sb did和would rather sb do的表达的意思不同。前者用过去时表示希望某人现在/将会做某事,（暗含事实上是不可能的）。后者仅表示主语宁愿做某事。
2、是否应用于虚拟语气。would rather sb did (didn't do) sth 一般用于虚拟语气。而would rather sb do并没有这个用法。
3、特殊用法不同。虚拟语气中，would rather sb did (didn't do) sth表示现在将来的事实相反，与之对应的是would rather sb.had done sth.用过去完成时则表示宁愿某人做过某事,与过去事实相反。而would rather sb do并没有这个用法。
扩展资料：
would rather的相近词组：had better；must
1、had better表示最好。had better 相当于一个助动词，它只有一种形式，它后面要跟动词原形。
用法：had better do sth；had better not do sth；had better have done sth表示与事实相反的结果，意为本来最好。
例句：
It is pretty cold. You'd better put on my coat.天这么冷，你最好穿上外套。
You had better have come earlier.你本该早点来。
2、must表示推测
must用在肯定句中表示较有把握的推测，意为一定。
must表对现在的状态或现在正发生的事情的推测时， must 后面通常接系动词be 的原形或行为动词的进行式。
例句：
You have worked hard all day.You must be tired. 你辛苦干一整天，一定累了。
He must be working in his office. 他一定在办公室工作呢。