I am writing this letter this morning.这句话改成现在完成进行时

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 wr i am not at home this morning.改成过去式. Dear all,I am writing this letter in my bedroom.I can see th 回答下列提问：Dear all,I am writing this letter in my room.I can se 英语翻译Good Day I am writing this letter in confidence believin i am writing this letter to thank you for teaching me englis 英语翻译I am writing this letter to you as you leave for prison. 英语翻译Dear Howard,I am writing this letter on Friday June 27,2 英语翻译HELLO MY DEAR ,I am writing this letter in confidence be 英语翻译HELLO & Greetings to you...I am writing this letter in c 英语翻译HELLO & Greetings to you.I am writing this letter in con 英语翻译I am writing this letter to thank you for you warm hospi