had a better后加什么

　　I've had a better time than they had.

　　我比他們有好時光。

　　This had a better effect.

　　這一罵倒有了好效果。

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

　　要是我們對這臺機器了解多一點的話，那就更好了。

　　Patients with smaller value of PI had a better prognosis.

　　預后指數值小的患者預后好。

　　But now I had a better idea.

　　現在我有個更好的主意。