i'm being 后面接什么词?

i'm being 后面接什么词? I'm being serious I'm being tested on it tomorrow什么时态 i'm used to 后面可接什么? I'm afriaid of being late.这句话里为什么加个being?它是什么用法? I’M sure后面跟什么 英语I和I'm后面分别加什么词,意思有什么不同. i'm a size eight.i like white___ White后面接什么 i'm sorry for being late. I;'m afraid of being alone i'm 2 months away from being I'm happy just being me!