Question

用现在进行时肯定句,分别用上am 、is、are主语+ be+V-ing+其他这句词有哪些？

Answer 1

助动词be可以是现在式和过去式，但分词可以不同。
I am reading a story. 我在读小说。
He is eating an apple.他在吃苹果。
They are playing football.他们在踢足球。
Jim was having a lesson then. jim当时正在上课。
We were enjoying the holiday at that time.那时我们正在度假。