You should stand behind the yellow line. All children should get a library card at the local library. Jason ought to take shower before he goes to bed. We ought to fly to New York to get there sooner. Tony shouldn't buy the 50" TV at the price. They shouldn't talk while the movie is playing.
Examples for had better/had better not
You had better take the medicine the doctor prescribed you. Alex and Jane had better show up for our team presentation. I had better not eat fried foods if I want to stay healthy. Thomas had better not eat the cookie before dinner.
Some Rules
*We use modals of advice to talk about what is or isn't a good idea.
*All modals are followed by the base form of a verb.
*Had better (not) is stronger than should (not) or ought to. It means something bad could happen if the advice isn't followed.
*We can use maybe, perhaps, or I think with modals to make the advice sound gentler and friendlier.