- Don’t ask him his age.
Ask for is used to ask somebody to give something.
- Don’t ask me for money.
Ask can be followed by an object.
- Ask him.
When ask is followed by two objects, the indirect object (the person) usually comes first.
- Ask him his name. (NOT Ask his name to him.)
Infinitive structures after ask
Ask can be followed by an infinitive.
- I asked to leave. (= I asked permission to leave.)
Ask + object + infinitive is also possible.
- I asked him to leave. (= I wanted him to leave.)