had better

See better (adverb)

• "You had better finish that homework on time, if you want to get a good grade."
• "“Will we get it finished?” / “We had better.”"
• "The project had better get finished by the current deadline."
• "I ought to go and see Mike one of these days. - Well, you'd better do it soon, because he’s leaving for Tanzania at the end of the week."

• had best