3 sentences

1. 换季时，很多商店会拍卖过季的衣服。

   huàn​jì shí, hěn​duō shāng​diàn huì pāi​mài guò​jì de yī​fu.

   At the change of seasons, many stores hold clearance sales for out-of-season clothes.

   Source: Dong Chinese Dictionary

2. 由于换季，商店里的衣服都在打折扣。

   yóu​yú huàn​jì, shāng​diàn lǐ de yī​fu dōu zài dǎ​zhé​kòu.

   Due to the change of season, the clothes in the store are all discounted.

   Source: Dong Chinese Dictionary

3. 这种折叠箱非常适合收纳换季的衣服。

   zhè zhǒng zhé​dié​xiāng fēi​cháng shì​hé shōu​nà huàn​jì de yī​fu.

   This folding box is perfect for storing out-of-season clothes.

   Source: Dong Chinese Dictionary