have to

• 表示必要性、义务或被迫的语法结构，即因为规则、情况或需要而必须做某事。

A grammatical pattern used to express obligation, necessity, or strong recommendation. It indicates that something is required, expected, or important to do. It is widely used in both spoken and written English and can vary in strength depending on context.

搭配模式have · to · SLOT

1. External obligation or rulesA2formal

   Used to express obligation coming from external sources such as rules, laws, instructions, or other people’s authority.

   外部义务或规定

   • I have to wear a uniform at work.
   • You have to stop at a red light.
   • We have to follow the instructions.
   • She has to finish this report by tomorrow.
   • They have to pay taxes.
   • Students have to attend classes regularly.
   • You have to show your ID here.
   • He has to obey the rules.
   • We have to be quiet in the library.
   • Drivers have to be careful on this road.

2. Personal necessity or circumstancesA2informal

   Used to describe situations where the speaker feels something is necessary due to circumstances, even if not imposed by rules.

   个人必要性或客观情况

   • I have to wake up early tomorrow.
   • She has to take care of her children.
   • We have to leave now if we want to catch the train.
   • He has to work late today.
   • They have to save money.
   • I have to call him later.
   • She has to study for the exam.
   • We have to hurry.
   • He has to fix his car.
   • I have to go now.

3. Strong recommendation or adviceB1informal

   Used to give strong advice or recommendation, implying that something is important or the best course of action.

   强烈建议或劝告

   • You have to see this movie.
   • You have to try this restaurant.
   • You have to read this book.
   • You have to meet her.
   • You have to visit this place.
   • You have to listen to this song.
   • You have to check this out.
   • You have to talk to him.
   • You have to watch this show.
   • You have to learn this technique.