plz correct these sentences!

他们是大夫医生。
我买衣服。You should provide an English version.  So many ways to correct and each gives a different meaning.  I bought some clothes, 我买了衣服, I want to buy some clothes,  我要买衣服, etc
这套/件大衣是很好看。
这是一條蓝色的裤子。
这套/件上衣是合适。
你喜欢黄颜色。or 黃的顏色