1) He is busily engaged in writing a thesis.
他正忙着写论文。
2) He is busy in writing his love letters
他正忙着写情书。
3) He was busily engaged in writing letters.
他正忙于写信。
4) He was busily engaged writing letters.
他正忙於写信。
5) he's busy at the moment.
他现在正忙着呢。
6) He is in the middle of washing up.
他正忙着洗碗碟。
补充资料：我们
1.代词。称包括自己在内的若干人。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条