need后面加to do还是doing

need to do 需要做某事，表示主动，主语一般为人，need doing 某物/人需要被做某事，表示被动，主语一般为物。

Children need to be cherished.

儿童需要无微不至的爱护。

We need to preserve the forest.

我们需要保护森林。

They need to feel they belong.

他们需要有归属感。

I need to lengthen this skirt.

我需要把裙子放长。

You need to practise every day.

你需要每天练习。

We need to plan for the future.

我们需要为将来作好打算。

We'll need to start at 7.00.
(www.ws46.com)

我们需要在7点钟出发。

We need to stock up the freezer.

我们需要在冰柜里存满东西。

We need to increase productivity.

我们需要提高生产力。

The cut will need to be stitched.

这伤口需要缝合。

I need to work on my swing.

我需要改进我的挥杆动作。

need to doing举例：

We need to do something to relax.

我们需要做些事情来放松放松。