What are the situation the term I'm afraid can be used?

[Sugshri]

Hi,
I would like to know what are the situation to use the term I'm afraid

[Morteza]

Hi,
I think it is used whenever someone wants to say "I'm sorry" in a formal/polite way:
I'm afraid we'll arrive late.
Also,it is used when we want to say "No!" to someone's request so that he/she doesn't get sad or annoyed:
-Do you feel like going to the cinema tonight?
-I'm afraid,not.
Hope this helps.
Morteza

[Surendra.s.kanthavara]

Hi
I'm surendra
I'm an Indian
I'm from Bangalore City,(India)
I'm a oracle DBA teacher.