15 过去将来完成时
should have done , would have done
I believed by the end of that year an advanced version of that software would have been developed, but I was wrong.我坚信到那年年底为止，那个软件的新版本将被开发出来。但是我错了。(此句为被动语态)
16 过去将来完成进行时
should have been doing , would have been doing
They said that by the end of the following month, the project would have been being worked for 3 years. 他们说到第二个月底为止，这项工程就已经不停地进行了3年了。
延伸阅读
2018长沙初一英语时态知识点（四）
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15 过去将来完成时
should have done , would have done
I believed by the end of that year an advanced version of that software would have been developed, but I was wrong.我坚信到那年年底为止，那个软件的新版本将被开发出来。但是我错了。(此句为被动语态)
16 过去将来完成进行时
should have been doing , would have been doing
They said that by the end of the following month, the project would have been being worked for 3 years. 他们说到第二个月底为止，这项工程就已经不停地进行了3年了。
延伸阅读
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二元一次方程强化练习
扫码关注“长沙升学那些事”公众号
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15 过去将来完成时
should have done , would have done
I believed by the end of that year an advanced version of that software would have been developed, but I was wrong.我坚信到那年年底为止，那个软件的新版本将被开发出来。但是我错了。(此句为被动语态)
16 过去将来完成进行时
should have been doing , would have been doing
They said that by the end of the following month, the project would have been being worked for 3 years. 他们说到第二个月底为止，这项工程就已经不停地进行了3年了。
延伸阅读
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