本帖最后由 hua_chris 于 2013-8-6 14:25 编辑 . r5 o6 u* D( G3 g; _+ H. t# ^! u+ D) P3 e, c
Last night, I took part in a party. 1 W% {7 |' a* ^& n) s- 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.