He's a student of my mum's

[zaffy]

"He's a student of my mum's" - I believe the possessive form with the mum is necessary, is it?

Can I say "He's a student of my mum"?

 

[AnythingGoes]

The possessive form is more natural.

 

[zaffy]

And can I say "That's a car of my mum's"?, if she has a few of them.

 

[Glenfarclas]

And can I say "That's a car of my mum's"?, if she has a few of them.

I guess, but it wouldn't be natural. It would be better to say, "That's one of my mum's cars."

 

[velisarius]

Can I say "He's a student of my mum"?

You can, if you mean that he studies your mum.

 

[Szkot]

As with the cars, 'he's one of my mum's students' sounds better.