My mind was not on what the teacher was saying,so I am afraid I some

问题描述:

My mind was not on what the teacher was saying,so I am afraid I some
My mind was not on what the teacher was saying,so I am afraid I some of the important points.
为什么用missed不能用完成时?

My mind was not (on what the teacher was saying),so I am afraid I missed some of the important points.
前后时态要一致.