她穿着一件漂亮的裙子。。翻译下。

She wears a beautiful red skirt
Jack wears a hat

shi is in a gorgeous red dress.
jack wears a cap.

She wears a beautiful red dress/skirt.
这里是表示状态，所以不能用表示动作的put on。
She is in a beautiful red dress/skirt.这个也可以

Jack wears a hat.

She wears a beautiful red skirt 。。。。。。
Jack wears a hat。。。

she wearing a beautiful red dress.

Jack wears a hat

She is in a cute red dress.
这是地道的翻译，哈哈。