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c.用来陈述原因或用作借口
She went to the doctor yesterday. She was having a lot of trouble with
her heart.
她昨天去看病了。她患了很严重的心脏病。
I haven't finished my homework because I was helping my mother at home
all day yesterday.
我作业没做完是因为我昨天一直帮妈妈在家干活。
d.与always, constantly等词连用，表示感情色彩
The girl was always changing her mind.
这女孩老是改变主意。
In the past he was constantly asking me for money.
过去他总是向我要钱。
3．过去进行时与一般过去时的区别
①一般过去时往往表示某一动作已经完成，而过去进行时却表示动作在持续或未完成。
She wrote a letter to her friend last night.
她昨晚给朋友写了封信。（信写完了）
She was writing a letter to her friend last night.
她昨晚一直在给朋友写信。（信不一定写完）
②一般过去时表示只做一次动作，而过去进行时却表示动作反复地进行。
She waved to me.
她朝我挥了挥手。
She was waving to me.
她不断地朝我挥手。
The boy jumped up and down.
这男孩跳了一下。
The boy was jumping up and down.
这男孩不停地跳着。
C.将来进行时
1．将来进行时的构成
将来进行时是由“shall/will + be +现在分词”构成的。
Don't phone me between 8:00 and 10:00. We'll be having classes then.
8点到10点之间不要给我打电话，我们那时正在上课。
Will you be using your bicycle this evening?
今晚你用自行车吗？
She won't be having a meeting in her office at 8:00 tomorrow.
明天8点她不在开会。
2．将来进行时的用法
①将来进行时的基本用法
a.表示在将来某一时间正在进行的动作
I'll be taking my holiday soon.
我不久就去度假了。
They will be meeting us at the station.
他们会在车站接我们的。
b.在口语中代替will/shall do
I hope you will be coming on time.
我希望你按时来。
I'll be seeing Mr. Smith tomorrow.
我明天将见到史密斯先生。
The minister will be giving a speech on international affairs.
部长将就国际事务发表演讲。
②将来进行时的特殊用法
a.表示原因、结果或猜测
Please come tomorrow afternoon. Tomorrow morning I'll be having a
meeting.
请你明天下午来吧。我明天上午有个会。（表原因）
Stop the child or he will be falling over.
抓住那个孩子，要不他会掉下去的。（表结果）
You will be making a mistake.
你会出错的。（表推测）
b.用在问句中，表示委婉礼貌
Will you be reading anything else?
你还要看点儿什么吗？
When shall we be meeting again?
我们什么时候再见面？
c.表示稍后一点儿的安排
The students aer studying Unit 3 this week, and next week we'll be
studying Unit 4.
这星期我们学第三单元，下周我们将学第四单元。
My duties will end in July and I will be returning to Shanghai.
我的任务在7月结束，之后我会回上海。
完成时
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