should
肯定句:You should study hard.
否定句:You shouldn't lazy at school.
疑问句:Should you go to school tomorrow?
had better
肯定句:You had better study hard when you are young.
否定句:You had better not to go out this night.
疑问句:Do I had better stay home?
should
肯定句:You should study hard.
否定句:You shouldn't lazy at school.
疑问句:Should you go to school tomorrow?
had better
肯定句:You had better study hard when you are young.
否定句:You had better not to go out this night.
疑问句:Do I had better stay home?