属于hadbetter结构。You'dbetter译为：最好。。。用法：hadbetterdosthhadbetternotdosth如：You'dbetterwearwarmclothesinwinter.hadbetter也可以跟其它代词。如：They'dbetterfinishtheirworktoday.答题不易，满意请采纳！谢谢！有问题欢迎追问！
