Ni Zhen Piao Liang (You are pretty)

If you want to praise a girl, you can use:

ni = you

piao liang = pretty

ni zhen piao liang = you are really pretty

ni hao piao liang = you are so pretty

ni hen piao liang = you are very pretty





Grammar:

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

Note:
Some Chinese learners may create sentences like:
"Ni shi piao liang" or "ni piao liang" ---> They are ungrammatical.