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（复习电话用语和现在进行时）
3. Learn the past continuous tense.
（学习过去进行时）
1. A: What is she doing now?
B: She is doing some cleaning.
观察以上句子，你发现了什么？
2. A: What are they doing now?
B: They are planting trees.
were
from 9:00-10:00 last Sunday?
at that time?
was
was
were
3. A: What are you doing now?
B: I am having an English class.
were
at this time yesterday?
I was having a history class.
过去进行时： was/were +v.ing
过去进行时由be动词的过去式was/were加动词现在分词构
成，主要表示过去某个时刻或过去一段时间正在进行的动作。常
与at 6:30 yesterday, at this time yesterday, from 8:00 to 9:30 等时
间状语连用。
现在进行时：am/is/are +v.ing
read English
do some cleaning
sleep
play the piano
skate