you d better not后加什么？

youd better not后面直接加“动词原形”。youd better not是you had better not的缩写，而had better（not）do sth是固定搭配，意思是你最好（不要）做某事，故youd better not后面应该直接加动词原形。

You\'d better not read in that dim room.

你最好不要在那个昏暗的房间里看书。

You\'d better not take that bulky piece of luggage.

你最好不要带那件笨重的\'行李。

He has a strong backing, and you\'d better not set yourself against him.

他有背景，你最好别跟他拗。

You\'d better not stay out with your friends. You need to come back by 9 p.m.

你最好不要和你的朋友待在外面。你必须在晚上9点以前回来。

You\'d better not be here when I get back.

在我回来的时候你最好别在这。

You\'d better not have one if your liver\'s bad.

要是你的肝不好，你最好一杯酒也别喝。