本帖最后由 hua_chris 于 2013-8-6 14:25 编辑 % o b' H( a m$ t. a2 h7 M6 M % n6 ?) O! k# h4 ~1 u& YLast night, I took part in a party.' } e8 J/ E, i! { N1 n# v0 F2 c
Last 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.