本帖最后由 hua_chris 于 2013-8-6 14:25 编辑 ( i- }0 | m" ^1 I$ S 4 P. c, m0 Y1 I6 }6 P/ [Last night, I took part in a party. * q7 j0 F" n! M% A# O, i$ yLast 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.