资源简介

过去进行时
一、概念
表示过去某个时间点或时间段正在进行的动作。
二、构成
（一）肯定句
主语 + was/were + 动词的现在分词 + 其他。
I was reading a book at 8 o'clock last night.（昨晚八点我正在读书。）
She was singing in the classroom when I came in.（我进来的时候她正在教室里唱歌。）
They were playing basketball from 3 to 5 yesterday afternoon.（昨天下午三点到五点他们正在打篮球。）
（二）否定句
主语 + was/were + not + 动词的现在分词 + 其他。
I was not reading a book at 8 o'clock last night.（昨晚八点我没在读书。）
She was not singing in the classroom when I came in.（我进来的时候她没在教室里唱歌。）
They were not playing basketball from 3 to 5 yesterday afternoon.（昨天下午三点到五点他们没在打篮球。）
（三）一般疑问句
Was/Were + 主语 + 动词的现在分词 + 其他？
Were you reading a book at 8 o'clock last night （昨晚八点你正在读书吗？）
Was she singing in the classroom when I came in （我进来的时候她正在教室里唱歌吗？）
Were they playing basketball from 3 to 5 yesterday afternoon （昨天下午三点到五点他们正在打篮球吗？）
（四）特殊疑问句
特殊疑问词 + was/were + 主语 + 动词的现在分词 + 其他？
What were you doing at 8 o'clock last night （昨晚八点你正在做什么？）
Where was she singing when I came in （我进来的时候她正在哪里唱歌？）
Who were they playing basketball with from 3 to 5 yesterday afternoon （昨天下午三点到五点他们正在和谁打篮球？）
三、动词现在分词的变化规则（同现在进行时）
（一）一般情况下，直接在动词原形后加 -ing。
play - playing
read - reading
watch - watching
（二）以不发音的字母 e 结尾的动词，去掉 e，再加 -ing。
come - coming
make - making
write - writing
（三）以重读闭音节结尾，末尾只有一个辅音字母的动词，先双写这个辅音字母，再加 -ing。
run - running
stop - stopping
swim - swimming
（四）以 ie 结尾的动词，把 ie 变为 y，再加 -ing。
lie - lying
die - dying
tie - tying
四、常见标志词
at 8 o'clock last night（昨晚八点）、when I came in（当我进来的时候）、from 3 to 5 yesterday afternoon（昨天下午三点到五点）等表示过去具体时间点或时间段的短语。
五、用法
（一）过去某个时间点正在进行的动作
常与表示过去的具体时间点连用，如 at 9:00 last Sunday（上周日九点）、at noon yesterday（昨天中午）等。
My mother was cooking dinner at 6 o'clock yesterday evening.（昨天晚上六点我妈妈正在做晚饭。）
（二）过去时间段内持续进行的动作
常与表示过去一段时间的短语连用，如 from 8 to 10 this morning（今天上午八点到十点）、the whole morning yesterday（昨天整个上午）等。
They were cleaning the classroom the whole afternoon yesterday.（昨天整个下午他们都在打扫教室。）
（三）用于 when 和 while 引导的时间状语从句
when 引导的从句，动词既可以是短暂性动词（用一般过去时），也可以是延续性动词（用过去进行时）。从句动作发生时，主句动作正在进行。
When the teacher came in, we were talking.（老师进来的时候，我们正在讲话。）
while 引导的从句，动词必须是延续性动词（用过去进行时），强调主句和从句的动作同时进行。
While I was reading, my sister was watching TV.（我读书的时候，我妹妹正在看电视。）
六、练习题
（一）用所给动词的适当形式填空
I ______ (watch) TV at 7 o'clock last night.
She ______ (play) the piano when her mother came back.
They ______ (have) a party from 8 to 10 last night.
（二）将下列句子改为否定句
He was doing his homework at 9 o'clock last night.
They were dancing at the party when I arrived.
（三）对划线部分提问
She was reading a storybook at 8 o'clock yesterday evening.（对 reading a storybook 提问）
They were playing football on the playground at 3 o'clock yesterday afternoon.（对 on the playground 提问）

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