1 your shirt collar/sleeve is a little dirty.
2 妳的衣服袖口 太臟了，再換件別的衣服吧。
2 you cuff is too dirty clothes, and then change other clothes.
3 妳的衣服 太臟了 / 有點臟 脫下來我幫妳洗洗。
3 your clothes too dirty/take off a little dirty I wash for you.
4 妳襪子該洗了吧，好大的味道。
4 you should wash the socks, great taste.
5 妳的褲子有點臟，該去洗洗了。
5 your pants a little dirty, it's time to get to wash.