A + 跟/和 + B + 一模一样
一模一样 (yīmúyīyàng) is an adjective meaning "exactly the same" or "identical." It is a four-character expression used to emphasize that two things are completely alike with no differences whatsoever, and is stronger than simply saying 一样 (yīyàng, "the same").
这对双胞胎长得一模一样,我根本分不清。
Zhè duì shuāngbāotāi zhǎng de yīmúyīyàng, wǒ gēnběn fēn bù qīng.
These twins look exactly alike — I can't tell them apart at all.
她买了两件一模一样的裙子。
Tā mǎi le liǎng jiàn yīmúyīyàng de qúnzi.
She bought two identical skirts.
这两道菜味道一模一样,是同一个厨师做的吧?
Zhè liǎng dào cài wèidào yīmúyīyàng, shì tóng yī gè chúshī zuò de ba?
These two dishes taste exactly the same — they must be made by the same chef, right?