was doing
was doing
、had been
doing
和had been done都有什么区别 ...
（时态分享3）过去进行时(was/ were
doing
) - 简书
was doing
句型是什么意思啊？急！！！_百度知道
1主语+was/were
doing
when... 2主语+was/were about to
do
...
语法讲解：一般过去将来时表was/were+going+to+动词原形
Past continuous
( I was working ) - Cambridge Grammar
【零基础说英语 - 第61课】过去进行时 (was / were
doing
)
初中英语重点语法：过去进行时的用法和练习题详解_was
Past Continuous - I
Was Doing
- ESOL
what's the difference between did and
was doing
?
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