The modal “should” talks about giving advice and making recommendations.[1]https://www.ecenglish.com/learnenglish/lessons/should-modals It is similar to the modals of “must” and “have to”, but used in a slightly different way.

Advice
The modal “should” can be used to give advice. In addition, it can be used in the past, present, and future verb tenses.
For example:
Past
- You should
have eaten less for dinner. - She should
have arrived earlier to class. - They shouldn’t
have yelled loudly during the movie.
Present
- I should
exercise more regularly. - We should
eat now. - Joe should
help us with the housework.
Future
- Susie should
start studying for the test. - Mark shouldn’t
start complaining. - You should
start eating more healthily.
Expectation
The modal “should” can be used for expectation. In addition, it can be used in the past, present, and future verb tenses.
For example:
Past
- We should
have arrived by now. - They should
have been finished by now. - Frank should
have stopped cooking.
Present
- I should
be arriving now. - You shouldn’t
be studying now. - It should
be arriving now.
Future
- My friends should
be arriving in an hour. - The plane should
be landing in 2.5 hours. - The restaurant should be opening in 30 minutes.
Note: you can replace “should” with the words “be supposed to” and “ought to be”.
Obligation
The modal “should” can be used for obligations. There is not negative form when talking using should and talking about obligations.
For example:
- We should
let her know. - You should
go to sleep. - They should
be quite.
Note: you can replace “should” with the words “be supposed to”.
Question
You can used the modal should to ask for advice about something. The question form of the modal “should” is:
- Should I
wait for you? - Should
we tell her about it? - Should
they let us know?
Example Exercises
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References
