本帖最后由 hua_chris 于 2013-8-6 14:25 编辑 $ H" h3 @+ C, t. d6 h9 j5 W d9 x. V4 w2 u
Last night, I took part in a party. # |; R9 Y% N/ R1 @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.