可否用would better？

有读者问这道选择题：

The boy is difficult to deal with. You_________a word with him.

A. would better have　B. had better have

正确答案是B。是不是没有A这种说法？

应选B，即had better have。would better（相当于 had better）是美国的非正规的说法，故不可取。would better可能是由于误将缩略式'd better中的'd认为指代would所致。