1 . have been celebrating是 1 时，其结构为“ 2 ”。现在完成进行时表示动作在迄今为止的一段时间内曾经延续进行或目前仍在继续并有可能一直继续下去，强调动作持续进行的状态。常和“ 3 ”或“ since+时间点”连用。
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2 . 今年在Trent老师的帮助下，我的英语水平在不断地提高。
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2021-08-28更新
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124次组卷
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2卷引用：人教新目标版英语九年级全一册Unit14 Section A（3a~4b）同步导学
3 . 自从上周开始我一直在等你。
I_____________ ___________ ___________ for you since last week.
I
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4 . My father ________ in a panda protection center for 10 years.
| A．was working | B．is working | C．has been working | D．will working |
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5 . 为了使我的梦想成真，我一直在努力。
__________________________ .
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2021九年级下·全国·专题练习
6 . Housing prices ________ since a few years ago. Therefore, it’s time the central government ________ some effective measures to bring them under control.
| A．have increased; would take | B．have increased; will take |
| C．have been increasing; takes | D．have been increasing; took |
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7 . The old lady has been ________ (等待) for her son since the war was over.
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8 . He began to work in the city three years ago. (同义句转换)
He________ ________ ________ in the city for the past three years.
He
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2021-03-02更新
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166次组卷
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2卷引用：人教新目标版英语八年级下册Unit 10 Section B (2a-2d)课时练习
9 . —Emma, how long has Amy been collecting old clothes for making bags?
—Hmm, ________.
—Hmm, ________.
| A．three years ago | B．twice a month | C．in three years | D．for three years |
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