性格不好

He acts as if he knows everything.

他表现得好像她什么都知道。

He is just showing off.

他只是在炫耀。

He is bragging all the time.

他总是在吹牛。

He likes to stand out.

他喜欢引人注目。

He is arrogant.

他很自大。

He is very selfish

他非常自私。

He doesn't care about others.

他不知道要替他人着想。

He only thinks about herself.

他只想到自己。

He is picky about everything.

他对每件事都很挑剔。