求 4 个 present perfect progressive 句子

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求 4 个 present perfect progressive 句子
求 4 个 present perfect progressive 句子

求 4 个 present perfect progressive 句子
They have been to Sweden many times.他们去过瑞典许多次了.
Mother won’t let her watch TV until she has finished her homework.母亲要到她做完作业才让她看电视.
My brother has been in the army for some time.我兄弟参军有一段时间了.
We haven’t heard from her for a long time.我们很久没收到她的来信了.

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