本帖最后由 hua_chris 于 2013-8-6 14:25 编辑 , Z. F8 v4 A, [2 \! j2 ]7 Y/ Q+ S' y" H) ]4 R
Last night, I took part in a party. 6 D4 J a' |' a5 T, B0 ELast 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.