had better do=?

had better do=? 有关had better do it is better for sb to do than do = sb had better do had better not do?had not better do? 是had better to do还是had better do had better +do sth 还是had better +to do sth had better do还是had better to do had better do等于什么 I had better ___(do/to do) 是had better do sth还是have better do sth had better=? you had better (do)your homework