本帖最后由 hua_chris 于 2013-8-6 14:25 编辑 ' R, U/ T: Y+ ^* `2 |6 r3 \& ? 0 {1 i# O" g9 ^0 K3 p9 R, vLast night, I took part in a party.. s9 B4 B8 a7 S. [5 S4 K: p0 t
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.