本帖最后由 hua_chris 于 2013-8-6 14:25 编辑 ( ^+ [ ^* T( o+ T9 f+ Q2 ?' | + D$ U. V! v+ BLast night, I took part in a party. " Y. [) H* Z# S: Z0 ^- v0 V" {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.