UC知道帮我解决这道被动语态问题吧
来源：百度知道 编辑：UC知道 时间：2024/05/15 04:06:04
27) The construction of the laboratory ____by the end of next month.
A) must be completed
B) must have been completed
C) will be completing
D) will have been completing
选哪个？为什么？详细点了，谢谢
A) must be completed
B) must have been completed
C) will be completing
D) will have been completing
选哪个？为什么？详细点了，谢谢
The construction of the laboratory _B___by the end of next month.
A) must be completed
B) must have been completed
C) will be completing
D) will have been completing
----"by end of +将来时间"，动词用“将来完成时”，又由于The construction of the laboratory（实验室的建设）不会自己完成，应用被动语态，所以排除D,只能选完成时被动语态的B.
B 那个时候肯定已经建好了
因为是next month所以排除b
cd选项没有被动含义，排除
故选a
选B
很明显！选B 将来完成时 又是被动语态。因为完成的东西是在说话的将来，并且是完成状态！故 因选者B！