把下列句子由被动语态转变为主动语态

We usually deliver our letters in the morning
However, we only deliver one letter this morning
Up till now, we have only delivered this letter
We are sorting the other letters
We will delivered them next morning
这五个句子都是被动语态的句子
每个句子其实都隐含了一个施动者 we,
以第一个句子为例
可以把句子看成是
Our letter are usually delivered in the morning by us
信经常在早上被我们寄出去
这是被动语态的说法,转化成主动语态就可表达为“我们经常在早上把信寄出去”
主动语态区别于被动语态在于以人为主语,即‘我们’,
被动语态转换成主动语态首先要找到主语（we）,再把原句的主语（letters）变成宾语放在动词后面.提问呢?提问呢?We usually deliver our letters in the morning 主动提问：who usaully deliveresletters in the morning? ; 被动提问：what are usually delivered by us in the morning?However, we only deliver one letter this morning 主动提问:who only deliveres one letter this morning ? 被动提问：what is only delivered by us this morning?Up till now, we have only delvered this letter 主动提问: Up till now,who has only delivered this letter? 被动提问：Up till now, what is only delivered by us ?We are sorting the other letters主动提问: who is sorting the other letters? 被动提问：what is being sorted by us ?We will delivere them next morning主动提问who will delivere them next morning ?被动提问：what will be delivered by us next morning?