| I have twice as many pens as yours, is it grammatically
correct? |
|
It is grammatically correct, but you need to realize
that it means something very very strange.
In your sentence
yours means
your pens, so you are saying:
I have twice as many pens as your pens have.
Pens don't have pens, so you see, that's very strange!
(The others who have answered above have already explained what you need.)
CJ