"Ela deve estar muito feliz."

Translation: She must be very happy.

[Danikalifornia]

Could this also translate as "she SHOULD be very happy"?

[Paulenrique]

For Duo it is "Ela deveria estar muito feliz", but in Portuguese it takes the same meaning.

[Jones_Rick]

Can you say "ought" instead of "must" ?

[Paulenrique]

Yes, another possible option.

[e.cambourn]

Can someone please explain what verbs modal is about?

[zmjb1]

Yes, please explain. I dont even know what a modal is in English

[Luiz_BR]

It is a type of auxiliary verb that is used to indicate modality – that is, likelihood, ability, permission, and obligation.

[jaclyn9189]

Why is "deve" used here instead of "deveria," as in the other examples?

[Paulenrique]

deveria = should

[Robleh100]

must and should are not equivalent in English. One is imperative and the other normative. I believe this is true in Portuguese. Which is why deveria replaces devia. The script should not allow them to be