I am writing a letter.这里的writing是及物动词还是动名词啊?

填空－1.I am going to ____(type)this lette.2.my mum can ___ (swim) in a river. 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： 短文改错Dear Liu Hong,I am glad to receive you lette. Am I writing a letter?的反义疑问句是什么? I am writing a letter you in my school为什么 writing,my,i,a,father,letter,to,am 排句 I am busy writing a novel.是什么句型 I am writing a report now.改为一般疑问句 I am writing a letter.这里的writing是及物动词还是动名词啊? I am writing中am的作用 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 I _______the number down ____a piece of paper.A.am writting,onB.am writting ,inC.am writing ,onD.am writing,in i am reading,not ___A am writing B write C writing D was writing选哪个,为什么为什么不选A呢 Would you please____me his address?Oh,I am sorry.I forgot____it down.A.tell,writing B.tell,to write C.to tell,writing D.telling,writing I am doing a large a_____ of writing ,so I'm very busy I am writing to express my apology to you.和 I am writing to make an a pology to you.哪个更正式,商务