本帖最后由 hua_chris 于 2013-8-6 14:25 编辑 5 ^& n, Y8 A' g ) C6 j" y/ H# \' l9 gLast night, I took part in a party./ b) }; A7 }& K9 f. s
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.