necessary后面加什么介词

表示“对……有必要”,其后可接介词 to 或 for。

例句

It doesnt seem necessary for us to meet.

我们似乎没必要见面。

If necessary , you can contact me at home.

必要的话，我在家时你也可以和我联系。

Some adjustment of the lens may be necessary.

可能需要调整一下镜头。

Repairs are necessary to strengthen the bridge.

这座桥需要加固。

A radical overhaul of the tax system is necessary.

有必要彻底改革税制。

For him, reading was a necessary prelude to sleep.

对他来说，阅读是入睡的必要前奏。