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一般现在时:is/am/are +done The classroom is cleaned (by the students) every day.
一般过去时:was/were +done 300 trees was planted last year.
现在完成时:has/have been +done The work has been finished by Tom.
现在进行时:is/am/are being +done A new teaching building is being built in our school now.
过去进行时:was/were being +done A letter was being written by him at this time yesterday。
一般过去时:was/were +done 300 trees was planted last year.
现在完成时:has/have been +done The work has been finished by Tom.
现在进行时:is/am/are being +done A new teaching building is being built in our school now.
过去进行时:was/were being +done A letter was being written by him at this time yesterday。
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追答
1.教室每天被打扫。
2.去年种了300棵树。
3.这项工作已经被汤姆完成了。
4.现在我们学校正在建设一座新的教学楼。
5.昨天这个时候,他正在写一封信。
我也是临时想的,希望能帮上你。
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