2014-05-27 07:28:21 補充:
up to - occupied / busy with 忙着
What are you up to你正忙着做甚麼事
here so late這麼晚在這裡
then那麼
What are you up to, here so late, then?
那麼,你這麼晚在這裡正忙着做甚麼事呢?
What are you up to?
+ here so late?=by the two separate phrases
=here on=here upon=adv
=here in=adv=by the phrase means by Translation from E/C
為何遲到?
What's E/C?