behave
The Italian word 'comportarsi' is used in the same way as 'behave' in English. It is a verb that refers to the way a person conducts themselves in a particular situation or in general. It can be used to describe someone's manners, actions, or attitude.
You must always behave well.
This sentence is advising someone to consistently behave in a good manner.
I do not know how to behave in this situation.
In this context, the speaker is expressing uncertainty about the appropriate behavior in a specific situation.
She knows how to behave in case of emergency.
This sentence is expressing that a female individual is informed and prepared on the appropriate behavior during an emergency.