ask

1 ask and ask for
Ask for: ask somebody to give something Ask without for. ask somebody to tell something.
Compare:
– Don’t ask me for money, (not Don’t usk me money.)
Don’t ask me my name.
(More common than Don’t ask me for my name.)
– Ask for the menu.
Ask the price.
Ask
is sometimes used without for when talking about asking for sums of money, especially in connection with buying, selling and renting.
They’re asking Ј500 a month rent.
How much is the car? ask I’m asking fifteen hundred.
Note also the expressions ask a lot of somebody, ask too much of somebody, ask a favour of somebody and ask (for) permission.
2 infinitive structures
We can use infinitive structures after ask (see infinitives 4: after verbs-283). ask + infinitive I asked to go home. (= I asked permission to go home.)
ask + object + infinitive I asked John to go home. (= I told John I would like him to go home.)
ask + for + object + infinitive I asked for the children to have extra milk.
I asked for the parcel to be sent to my home address.
Note the difference between these two sentences:
I asked John to go home. (I wanted John to go home.)
I asked John if I could go home. (I wanted to go home myself.)
ask
• see ask
• + object + infinitive see indirect speech 4: infinitives.1 , see infinitives 5: I want you to listen
• + subjunctive see subjunctive.2
• ask to see infinitives 4: after verbs
• ask for … to see infinitives 13: for … to ….7
• passive structure (I was asked to) see passives 7: He is believed to be ….1
• with one and two objects see verbs with two objects.7

For more information consult a good dictionary like Langman, Oxford, Merriam Webster, or Collins.