Expressing A and B Are the Same/Different

yīyàng is used to express that two things are the same and bùyīyàng is used to express that two things are not the same.

Topic 1 + gēn/hé + Topic 2 + yīyàng / bùyīyàng

Zhèjiàn wàitào gēn nàjiàn wàitào yīyàng. ——> This jacket and that jacket are the same. 这件外套跟那件外套一样。

Zhètiáo kùzi de jiàqián hé nàtiáo kùzi de yīyàng. ——> The price of this pair of pants and that pair of pants are the same. 这条裤子的价钱和那条裤子的一样。

Zhètiáo qúnzi hé nàtiáo de dàxiǎo bùyīyàng. ——> The size of this dress and that dress are not the same. 这条裙子和那条的大小不一样。

In the first sentence, Wàitào is our subject, which means we are comparing the two wàitào。

In the second sentence however, kùzi de jiàqián is our subject; therefore, we are comparing the two kùzi de jiàqián。Question: What is the subject for the last sentence?

In the second sentence (and the third sentence), the “de jiàqián” (and "de dàxiǎo") only appeared once because you only need to mention the object you are comparing once. It can be mentioned either after the first subject, or after the second subject.

yīyàng can also go with an adjective. When using this structure, we are describing subject 1 is being as adjective as subject 2.

Topic 1 + gēn/hé + Topic 2 + yīyàng + adj

Zhèshuāng xiézi gēn nàshuāng xiézi yīyàng hǎokàn. ——> This pair of shoes and that pair of shoes the same good looking. (This pair of shoes is as good looking as that pair of shoes.) 这双鞋子跟那双鞋子一样好看。

Zhège shǒujī hé nàge shǒujī yīyàng guì. ——> This phone and that phone the same expensive. (This phone is as expensive as that phone.) 这个手机和那个手机一样贵。