You had better not do that.

你最好不要这样做。

You had better not smoke here.

你最好不要在这里抽烟。

You had better not go just now.

你现在最好不要去。

You had better not stay here very long.

你最好不要在这里待太久。

You had better not eat so much at night.

在晚上你最好不要吃得太多。

You had better not to come the moralist with us.

你最好别在我们面前摆出一副道德家的面孔.

You had better not spy into other people's affairs.

你最好不要窥探他人的私事。

When you drive you had better not play chicken with bigger cars.

当你开车时,不要和大车叫板.