二倍

僕(ぼく)の蔵書は彼(かれ)の二倍だ。

I have twice as many books as he.

僕(ぼく)の収入は君(きみ)の２倍だ。

My income is twice as large as yours is.

彼(かれ)は二倍の運賃を払った。

He paid double fare.

物価は２年(ねん)前(まえ)の２倍である。

Prices are double what they were two years ago.

彼(かれ)は本(ほん)を私(わたし)の２倍持っている。

He has twice as many books as I do.