Ask

Ask for = ask to speak to somebody; ask for news of/about something, ask for something.

Ask somebody in/out =invite somebody in (at home) or out (to a restaurant, to the cinema, etc..).

Prasal verb	Translation	Examples
Ask for somebody	Chiedere di qualcuno	Go to the library and ask for the director.
Ask after	Chiedere di qualcuno	I met Elizabeth at the theatre and she asked after you.
Ask somebody in	Invitare qualcuno	After the match I asked all my friends in.
Ask somebody out	Invitare qualcuno fuori	I phoned her and asked her out to dinner.