had better 意为“最好”，would rather 意为“宁愿”，两者均后接动词原形，否定式均应在动词原形前加 not；在否定疑问句和反意疑问句中可用 hadn’t / wouldn’t。如：
You’d better not disturb him. 你最好别去打扰他。
He’d rather (not) go by car. 他宁愿(不)坐汽车去。
注：would rather 后接宾语从句时，从句谓语要用虚拟语气，即用一般过去时表示现在或将来，用过去完成时表示过去。如：
I’d rather you went tomorrow. 我宁愿你明天去。
I’d rather he hadn't told me about it. 我宁愿他没告诉我这事。
