本帖最后由 hua_chris 于 2013-8-6 14:25 编辑 2 m% s5 M0 C$ \% l7 b. P* f # ~# B8 R& U5 s7 E5 aLast night, I took part in a party. Y" [! r# x+ [/ i
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.