have a good time的同义词有：have a wonderful/great/nice time；enjoy oneself；have fun等，have a good time意为玩的很开心。

had a good time用法

表示“玩的很开心，玩的很快乐，过得愉快， 玩得痛快”

We can just hang out and have a good time.

我们可以只是闲逛一下，开开心。

2.用于have a good time (in) doing sth，，表示“做某事很开心”。如：

You'll have a good time enjoying Beijing and the olympics.

你在北京和奥运会期间将度过一段愉快的时光。

小结

It's time for +名词、名词短语、动名词（动词ing形式）

It's time + to动词、动词短语

It's time that + 过去时的从句。（前期文章有所介绍）

例句

They have a good time together.

他们一起过得很愉快。

We'll have a good time.

我们会玩得很开心的。

But did we have a good time here?

我们在这度过了一段美好的时光不是吗?

You can have a good time.

你能玩的很高兴。

Would I have a good time?

我会玩得愉快吗？