Do the following two sentences have the same meaning, or B is one time higher than A? Thank you very much.
A. Your salary is twice as high as mine.
B. Your salary is two times higher than mine.
Sorry to poke my nose in but I have a question about your comments, Jscanlan.
I'm not familiar with the expression "twice as higher as another number." I learned that we should put a positive form like old and young, not older or younger. How come you use this expression and it is grammatically correct? If you give any explanations or pointers, I'd be very happy. Thank you.
But since you ask: A = 1 metre high; B = 2 m; C = 3m.
C is 2 metres higher than A; B is 1 meter higher than A; Both B and C are higher than A, but C is twice as higher than A than B is. And C is just as higher than B as B is than A.
(Now, please forget all about it).
But your explanation gives me another question.
Is "C is twice as higher than A" grammatically correct? I have never heard nor read this expression.
Of course not. Just think about it. The words 'as high as' make a comparison; 'higher' is comparative. Using them both at the same time makes no sense.
(Of course, the fact that something makes no sense doesn't mean nobody will ever use it. In Nashville Cats John Sebastian wrote something like - you can find it on the net if you can stand the bombardment of spam pushing ring-tones! - 'they all play twice as better than I will'.)
You'll even find twice as gooder if you search.