the photo looks beautiful这里的look为什么加s 还有He has a great sport

the photo looks beautiful这里的look为什么加s 还有He has a great sport The watch looks beautiful.(look为什么用s) she has beautiful look其中的look加s吗? He looks very angry 为什么look后面要加s He has a great sports collection collection为什么不加S sports为什么加 He looks beautiful 这里的beautiful 是什么成分? Look和Looks的区别是什么额?还有这个句子：It looks cool.里面的LOOK为什么要加“S”额?` He is a great writer.He has a beautiful m____ I have a great sports collection 为什么sport要加s she looks so young she look beautiful 这两个为什么look的后面下个是加S的,一个 He looks young,为什么加S 请问He has great concern for others 这里的has是什么意思 为什么不用is