have best do,have better do 这两种说法都有吗?

...都没有.
只有 had better do sth.最好做……
had better not do sth.最好不做……
sb had better do sth =might/may as well do sth
sb had better not do sth
it is better for sb to do sth
以上一个句型都表示某人最好做/不做某事
You'd better go at once.
You'd better bot tell him the truth.