I am writing this letter this morning.这句话改成现在完成进行时我英语不好啊!拜托各位!

问题描述:

I am writing this letter this morning.这句话改成现在完成进行时
我英语不好啊!拜托各位!

I have been writing this letter this morning.
现在完成进行时:has/have been doing

I have already written this letter this morning .

I have been writing this letter since this morning.
从今天早上开始我就在写这封信了.

I had been writing this letter since morning