had a better后加什么

I've had a better time than they had.

我比他们有好时光。

This had a better effect.

这一骂倒有了好效果。

It would be better if we had a better knowledge of the machine.

要是我们对这台机器了解多一点的话，那就更好了。

Patients with smaller value of PI had a better prognosis.

预后指数值小的患者预后好。

But now I had a better idea.

现在我有个更好的主意。