本帖最后由 hua_chris 于 2013-8-6 14:25 编辑 7 n+ e3 @- y' b! E& @3 g' X& [ . _- C( ]: y$ {8 J7 MLast night, I took part in a party. ( ~9 w1 E# F d+ xLast 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.