Question

i was playing the piano 和i am playing the piano 第一句成立吗 第二句呢

Answer 1

两个句子在特定的时间内都成立.

1.I was playing the piano 是过去进行时,后面可以接when you came in yesterday.意思是:昨天当你进来的时候,我正在弹钢琴.

2.I am playing the piano 是现在进行时,在前面加上Look!看/Listen!听/ It's 7:00 now现在是七点钟.

或者后面可以加上now.I am playing the piano now.意思是：我现在正在弹钢琴.

希望能帮到你哟.