forget (verb) forget + nounI forgot the address.forget + pronounDon’t forget him.forget + about + nounI almost forgot about the meeting.forget + to + base formDon’t forget to turn off the lights.forget + clauseI forgot I had an appointment at 3 p.m.forget + that + clauseI forgot that I had an appointment at 3 p.m.forget + wh- clauseI forget how much I paid for that.