过去进行时微课课件
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二者都有“当……时”的意思，但while 后只能跟延续性动词（即后面可加ing 的动词），而when 后既可跟延续性动词，又可跟非延续性动词，所有动词均 可。
（三）、描述一件事发生的背景，一个长动 作发生时，另一个短动作在发生。 For example: My brother fell while he was riding a bike.
我哥哥骑自行车时，摔倒了。
It was snowing when he left school . 他离开学校时，天在下雪。
（四）、常与always连用，表埋怨、责怪、 表扬和喜欢等感情。
For example:
My father was always smoking when she was young.
我父亲年轻时，总是抽烟。
I remembered She was often smiling when I talked to her.
我记得当我和她说话ຫໍສະໝຸດ Baidu经常微笑。
Exercise
1.When I arrived at his office , he _____on the phone. A. was talking B. talked C. talk D. talks 2.--I called you yesterday evening, but nobody answered the phone. --Oh, I_____ a walk with my parents at that time. A. took B. was taking C. am talking D. take
三、构成：
主语 十助动词was (were)十动词的现在分词
四、标志词：
at this time yesterday , at that time, at five last Sunday ,
the whole morning, all that day, then, night,以及when, while引导的时间状语从句。
last
五、用法
（一）、过去某一时刻正在进行或发生的动作。
（二）、过去某个时间前后两个动作是同时进行的。
For example:
当老师进来时你们正在干什么？ 老师进来时他正在读书。他在读书时，我在写作业。
What were you doing when the teacher came in？ He was reading books when the teacher came in . While he was reading books ,I was doing my homework. 特别注意：when 与while 的区别
While
What were they doing yesterday afternoon?
He was playing basketball while she was sleeping.
were buying clothes (在买衣服） 3. They ______________________ when the UFO arrived.
heard were you________ doing when you _____ 4. What ________ the alarm? (当听到警报的时候, 你在干什么?)
过去进行时微课
岱岳区满庄一中 李华
一、定义：过去某一时间正在进行的动作。
二、与现在进行时的异同：
现在进行时的构成为： 主语 十助动词am/is/are十动词的现在分词。
I was having dinner with my friends at this time yesterday.
You were having a math class at this time yesterday.
（三）、描述一件事发生的背景，一个长动 作发生时，另一个短动作在发生。 For example: My brother fell while he was riding a bike.
我哥哥骑自行车时，摔倒了。
It was snowing when he left school . 他离开学校时，天在下雪。
（四）、常与always连用，表埋怨、责怪、 表扬和喜欢等感情。
For example:
My father was always smoking when she was young.
我父亲年轻时，总是抽烟。
I remembered She was often smiling when I talked to her.
我记得当我和她说话ຫໍສະໝຸດ Baidu经常微笑。
Exercise
1.When I arrived at his office , he _____on the phone. A. was talking B. talked C. talk D. talks 2.--I called you yesterday evening, but nobody answered the phone. --Oh, I_____ a walk with my parents at that time. A. took B. was taking C. am talking D. take
三、构成：
主语 十助动词was (were)十动词的现在分词
四、标志词：
at this time yesterday , at that time, at five last Sunday ,
the whole morning, all that day, then, night,以及when, while引导的时间状语从句。
last
五、用法
（一）、过去某一时刻正在进行或发生的动作。
（二）、过去某个时间前后两个动作是同时进行的。
For example:
当老师进来时你们正在干什么？ 老师进来时他正在读书。他在读书时，我在写作业。
What were you doing when the teacher came in？ He was reading books when the teacher came in . While he was reading books ,I was doing my homework. 特别注意：when 与while 的区别
While
What were they doing yesterday afternoon?
He was playing basketball while she was sleeping.
were buying clothes (在买衣服） 3. They ______________________ when the UFO arrived.
heard were you________ doing when you _____ 4. What ________ the alarm? (当听到警报的时候, 你在干什么?)
过去进行时微课
岱岳区满庄一中 李华
一、定义：过去某一时间正在进行的动作。
二、与现在进行时的异同：
现在进行时的构成为： 主语 十助动词am/is/are十动词的现在分词。
I was having dinner with my friends at this time yesterday.
You were having a math class at this time yesterday.