I have received a letter from my old school,informing me that my former headmaster ...为什么用informing,句中做什么成分?

i have written him several letters but I have never received a singl r_____ /a ________ 解释句子成分:I have just received a letter from my brother.为什么just放在received前? 高三英语选择题--Have you heard from Nelly recently?--Yes.I __ his letters and cards many times while I was in Italy.A.have received B.received C.had received D.would received需讲解 句子辨析:I have just received a letter from my brother,Tim.I have just received a letter from my brother,Tim.I just have received a letter from my brother,Tim.两句是否一样.第二句just在前, ____ your letter,I would have started two days ago.A If I received B Shoud I receiveC If I could have received D Had I received本题答案是D I have received it thanks.是什麼意思? the only letter which I have received is still on the shelf .the only letter which I have received is still on the shelf .选择错误部分：A：which B：have received C：is D：on the shelf并修改! I,a,letter,have,uncle,my,from,just,received,造一个句子. 把I mailed a litter to you last month.Have you received it?翻译成中文. I have just received a letter from my brother.（同义句）=I have just ____ ____ my brother. I have been received your letter 和 I have received your letter有何区别? I have not received my pay yet为什么用have I have received a special gift （on my tenth birthday）. 这里have要加还是不加. #[57] Recently I _____ 30 letters from the customers complaining about the quality of our products.A.receivedB.had receivedC.receiveD.have received翻译并分析. i revceived和i have received这两句有什么区别啊? i just won the match i have just received a letter from my brother为什么一个有have 一个没有have呢 THE BEST GIFT I HAVE EVER RECEIVED英语作文 I have received his letter yet同义句