I'm writing a letter athome.(改为否定句,一般疑问句,肯定回答、否定回答,提问）

I'm writing a letter I‘m writing a letter.改成问句 I'm writing a letter 改为特殊疑问句 I am writing a letter是什么意思 I am not writing a letter.改错、 I am writing a letter.提问： I not writing a letter.改错 I'm writing a letter ____ my friend. A.to B.for C.at D.on I'm writing a letter to my mother.变成一般疑问句,my必须变成your吗 I'm writing a letter to my mother.怎样变成疑问句 I'm writing a letter now用tomorrow morning改写句子 I'm writing a letter now.(用tomorrow morning改写句子) writing a letter是什么意思 writing a letter是什么意思 i'm reading a newspaper ___ Mr Zhang is writing a letter我填when对吗?为什么 应该填什么? Am I writing a letter?的反义疑问句是什么? 现在完成进行时态与现在进行时态的区别是什么?例如i have been writing a letter和i am writing a letter例如i have been writing a letter和i am writing a letter有什么区别 a,letter,was,just,i,now,writing怎么写