作业帮Great changes___(take)place in HK in the past 10 years.
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Great changes___(take)place in HK in the past 10 years.
RT.
RT.
1.答案只能是一个：have taken
2.
1）如果句子的时间状语是“in/during/over the last/past + 一段时间”时,该句一般只能使用现在完成时.
2）因为该短语意思是“在过去的多少时间之内”,即“从现在开始往前数一段时间”,即截止到现在的一段时间,而该期间所发生的动作正好用现在完成时来表示.
3.再如：
Great changes have taken place in HK in the past 10 years.
= HK has experienced great changes in the past 10 years.
2.
1）如果句子的时间状语是“in/during/over the last/past + 一段时间”时,该句一般只能使用现在完成时.
2）因为该短语意思是“在过去的多少时间之内”,即“从现在开始往前数一段时间”,即截止到现在的一段时间,而该期间所发生的动作正好用现在完成时来表示.
3.再如：
Great changes have taken place in HK in the past 10 years.
= HK has experienced great changes in the past 10 years.
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