I had better ___(do/to do)

I had better ___(do/to 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 I do not do very ___ in Maths.I want to do better but do not 有关had better do had better do=? tell sb to do sth had better do tell sb not to do sth had be • 最好不做某事是had better not do sth 还是had better not to do 最好不做某事是had better not do sth 还是had better not to do sth had better do sth与had better to do sth用法有区别吗?什么区别? it is better for sb to do than do = sb had better do