小升初英语情态动词have tohave to加动词原形表示不得不、必须的概念。它比must更含有客观条件使得必须如此做的意思，并有较多的时态。如：Mr. Johnson has to work very hard to earn a living.约翰逊先生为了谋生不得不拼命干活。I had to leave the party early last night. I wasnt very well.昨晚我只得早点离开晚会，我不大舒服。We will have to get up very early tomorrow.我们明天必须起得很早。I shall have to go to the clinic today for my bad cough.我咳嗽得厉害，今天必须去诊疗所看看。注口语中的I have got to，you have got to等：I have to，you have to. Have I got to?和Do I have to?这两种疑问形式均可用。
