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2019年中考英语时态：过去进行时
标志：was / were + 动词的现在分词
1. 表示过去某一时刻或一段时间正在进行的动作，过去进行时中常用的时间状语有the whole morning, all day yesterday, from January to March last year等。如：
I was having a talk with Lucy at that time.
They were watching TV at home last night.
2. 表示过去反复出现或习惯性的动作，往往包含说话者赞扬、责备、厌恶等情绪，通常与always, constantly, continually, forever等频度副词连用。如：
My brother was always losing his keys.
3. 表示按计划、安排过去某时刻将要发生的动作，仅适用于部分趋向动词(如go, come, leave, start, arrive等)。如：
He said they were leaving for Beijing this afternoon.
4. 过去进行时有一个主要用法就是描述一件事情发生的背景(一个长动作延续的时候，另一个短动作发生)：
Granny fell asleep when she was reading.
It was raining when they left the station.
2019年中考英语时态：现在完成时
标志：have / has + 动词的过去分词
1. 表示一个过去发生并已完成的动作对现在产生影响或结果，强调的是现在的状况(表示“已完成”)。如：
He has left the city. (结果：他目前不在这个城市)
Someone has broken the window. (结果：窗户破了)
2. 表示一个动作开始于过去，持续到现在，也可能还会继续持续下去(表示“未完成”)。
I have been busy since last week.
He has taught in our school for 30 years.
I’ve finished half so far.
注意 瞬间动词通常是不能用现在完成时表持续性的，但其否定结构则可以。如：
She hasn’t seen you for ages.
His father hasn’t touched beer for a whole week.
3. 表示过去到现在为止反复发生的动作或多次出现的状态，常与表示频度的副词always, often, every day等连用。如：
I have often heard that ...
