Then I started to write my own original sentences using the grammar I was learning.

分类: 作业答案 • 2023-01-09 15:24:06

问题描述：

Then I started to write my own original sentences using the grammar I was learning.
using做状语为什么用过去分词形式

答

主句 I started 是过去时,状语用过去进行时(正在学的语法）相配合.
当然用 had + 过去分词也可以（表示过去已经学了的语法）.