本帖最后由 hua_chris 于 2013-8-6 14:25 编辑 @' k: ?& ~$ [5 h. }* H: z6 b " |' X8 a# V; T5 f! RLast night, I took part in a party.% k2 I4 R; @5 U6 R6 A
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.