You ought to ask for your teacher's permission. ✬

Don't ask for money. ✬

Don't hesitate to ask for advice. ✬

He didn't like to ask for help even if he was starving. ✬

You can always ask for his help. ✬

You have only to ask for it. ✬

I don't know who to ask for advice. ✬

I decided to ask for my friend's help. ✬

I'm going to ask for a new desk. ✬

Don't hesitate to ask for information. ✬