Lesson 2

Lección 20/29 | Tiempo de estudio: 40 Min
Lesson 2

Use of modal verbs to express obligation and prohibition.


Use the context related to falling in love.

Modal Verbs for Obligation:

"Must" and "Have to" are used to express strong obligation or necessity.

Example:

🔊
You must finish your homework before going out.
🔊
I have to attend the meeting tomorrow.


Modal Verbs for Milder Obligation:

"Should" is used to express advice or a milder obligation.

Example:

🔊
You should apologize for your mistake
🔊
We should take care of our environment.


Modal Verbs for Prohibition:

"Must not" and "Cannot" are used to express prohibition or something that is not allowed.

Example:

🔊
You must not smoke in this area.
🔊
Students cannot use their phones during exams.


Using "Must" and "Have to":

"Must" and "Have to" are often used interchangeably, but "must" is usually used when the obligation comes from the speaker, while "have to" implies an external obligation or requirement.

Example:

🔊
I must finish my work today.
(personal obligation)
🔊
You have to submit the report by tomorrow.
(external obligation)


Using "Should":

"Should" is used to give advice or to express a recommendation. It suggests that something is a good idea but not necessarily mandatory.

Example:

🔊
You should exercise regularly for good health.
🔊
We should be more mindful of our words.


Forming Negative Forms:

To express prohibition or a negative obligation, add "not" after the modal verb.

Example:

🔊
You must not exceed the speed limit
🔊
We cannot ignore the importance of education.


Forming Questions:

To form questions with modal verbs, invert the subject and the modal verb.

Example:

🔊
Must I finish this task today?
🔊
Should we book the tickets in advance?


Remember that modal verbs express obligation and prohibition, but the level of obligation can vary. It's important to consider the context and the relationship between the speaker and the listener when using these modal verbs.


Activity

1. Choose the correct option that best expresses the obligation or prohibition in each sentence.






call your parents regularly. ( should / mustn't / can't / may)





arrive on time for the meeting. ( could / shouldn't / must /might )





smoke in the office. ( can / shouldn't / mustn't / may )





be kind to each other. ( might / can't / must / shouldn't)