作业帮关于英语完成时的题目.1.改错：We have opened the door for 3 hours.可不可以改成: [The door has been opened by us for 3 hours.]?2.Many people have started to join our group since it began.(改为一般过去
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![关于英语完成时的题目.1.改错：We have opened the door for 3 hours.可不可以改成: [The door has been opened by us for 3 hours.]?2.Many people have started to join our group since it began.(改为一般过去](/uploads/image/z/2866040-8-0.jpg?t=%E5%85%B3%E4%BA%8E%E8%8B%B1%E8%AF%AD%E5%AE%8C%E6%88%90%E6%97%B6%E7%9A%84%E9%A2%98%E7%9B%AE.1.%E6%94%B9%E9%94%99%EF%BC%9AWe++have++opened++the++door++for++3++hours.%E5%8F%AF%E4%B8%8D%E5%8F%AF%E4%BB%A5%E6%94%B9%E6%88%90%3A+%5BThe++door++has++been++opened++by++us+++for++3++hours.%5D%3F2.Many++people++have++started++to++join++our++group++since++it++began.%28%E6%94%B9%E4%B8%BA%E4%B8%80%E8%88%AC%E8%BF%87%E5%8E%BB)
关于英语完成时的题目.1.改错：We have opened the door for 3 hours.可不可以改成: [The door has been opened by us for 3 hours.]?2.Many people have started to join our group since it began.(改为一般过去
关于英语完成时的题目.
1.改错：We have opened the door for 3 hours.
可不可以改成:
[The door has been opened by us for 3 hours.]?
2.Many people have started to join our group since it began.
(改为一般过去时态)
麻烦解释一下,我英语不是很好.
The door has been opened by us for 3 hours
The door has been open for three hours
这两个句子有什么区别吗?
关于英语完成时的题目.1.改错：We have opened the door for 3 hours.可不可以改成: [The door has been opened by us for 3 hours.]?2.Many people have started to join our group since it began.(改为一般过去
1 可以啊,你这样是正确的
2 只是改为一般过去时,主句和从句都要变一下,many people started to join our group when it begins