时间状语从句前后究竟要不要加逗号?As I went by, he was . When I arrived, they were.这两句里逗号可以去掉吗?He was singing when I . 这句when前边需要加上逗号吗?

分类: 作业答案 • 2021-12-19 10:35:27

问题描述：

时间状语从句前后究竟要不要加逗号?
As I went by, he was .
When I arrived, they were.这两句里逗号可以去掉吗?
He was singing when I . 这句when前边需要加上逗号吗?

答