He must remember to ask her next time they met.
He must remember to ask them how it was done.
I must remember to ask my son to explain the process to me.
He could never remember to ask people who came to the door to state their business.
She would have to remember to ask the security chief about it later.
He must remember to ask her what she would like to see.
He's the kind of guy who remembers to ask about your kids, by name.
She'd have to remember to ask him later; she was certain he had some good reason.
And she really must remember to ask him what the rate was.
Remember to ask your students what they thought of it too.