本帖最后由 hua_chris 于 2013-8-6 14:25 编辑 & s- ~6 s$ ?4 A# d p% F$ U. u- [+ g$ D
Last night, I took part in a party. % ~3 W' J* {( P# [9 P: f7 p JLast night, I was taking part in a party.
to me, all 4 are ok and acceptable. depend on where and how you are going to use them. picking one over another doesn't make the sentence any more or less sophisticated.