你的衣服好漂亮啊！英语怎么说啊

Your clothes are gorgeous!
如果是为了称赞她，可以直接说：
You look fabulous!

How nice your clothes is !
How nice your dress is !
What a nice clothes you are wearing!
...还有很多种说法。不一一列举了

How beautiful are your clothes!
What beautiful clothes!

your cloths is so beautiful..
or you've dressed so well !

Your cloths is so beautiful！
How nice/beautiful your clothes is !