“你今天真漂亮”用英语可以说成 "You look really beautiful today."。
这句话是用来表示对对方今天的美丽外貌的赞美。 "You look" 是动词短语，意思是“你看上去”， "beautiful" 是形容词，意思是“美丽的”， "today" 是副词，意思是“今天”。
举例：
"Wow, you look really beautiful today!" (哇，你今天真漂亮！)
"I just wanted to tell you, you look stunning today." (我只是想告诉你，你今天真美)
"You're looking especially lovely today." (你今天特别可爱)