must / have to

You ___ wear a seatbelt when you drive. It’s the law.

Obrigação externa

• must

• have to

• can

I ___ finish this report by tomorrow. My boss is waiting.

Obrigação pessoal ou regra forte

• must

• don’t have to

• can

Students ___ bring their own lunch if they want to eat in the park.

Obrigação externa

• must

• have to

• don’t have to

You ___ talk during the exam. It’s forbidden.

proibição

• must

• mustn’t

• have to

We ___ wake up early tomorrow. There’s no work.

ausência de obrigação

• mustn’t

• have to

• don’t have to

He ___ call his parents every weekend. It’s a family rule.

obrigação externa

• has to

• musts

• must to

I ___ clean the house today. It’s already clean.

ausência de obrigação

• mustn’t

• don’t have to

• have to

You ___ speak loudly in the library. It’s a quiet place.

proibição

• must

• mustn’t

• have to

We ___ get a visa before we travel. It’s a requirement.

obrigação

• must

• don’t have to

• can

He ___ take his medicine every day, or he’ll get sick.

obrigação externa

• has to

• musts

• have to