Ni Zhen Shuai (You are handsome)

ni = you

shuai = handsome

ni zhen shuai =  you are really handsome

ni hao shuai =  you are so handsome

ni hen shuai =  you are very handsome








Grammar:
The sentence structure is: [Subject] + [Adverb] + [Adjective]












Note:
Some Chinese learners may create sentences like:
"Ni shi shuai" or "ni shuai" ---> They sound weird to native speaker's ears.