out of style 过时的;不时髦的 in style 正流行的;时髦的

My clothes are out of style.

我的衣服都过时了。

Your clothes are in style.

你的衣服很时髦。

A:I'm going to buy a lot of clothes during this year's shopping spree.

我打算在今年的购物狂欢节买很多衣服。

B:Why?

为什么?

A:Because many of my clothes are out of style.

因为我的很多衣服都过时了。