求详解：Mr.Page will have been teaching for a total of forty years翻译过来是配齐先生已经执教满40年了为什么会要用will have been难道不是配齐先生将要完成40年的教师事业么?为什么会是已经完成呢

PHP:$page=isset($_GET[page])?$_GET[page]:1; 求详解 求详解：Mr.Page will have been teaching for a total of forty years翻译过来是配齐先生已经执教满40年了为什么会要用will have been难道不是配齐先生将要完成40年的教师事业么?为什么会是已经完成呢 will be 什么时态例如Mr.Reginald Page ,will be retiring next week. 概念二L85,Mr.Page will have been teaching for a total of forty years!这个时态是将来完成进行时吗 Mr.Page will have been teaching for a total of forth years.在这句话中,我想知道为什么要用will have been teaching(will have been doing)这个时态,而不是will have teached(have been done) 跪求一段英文翻译For example, a browser will send a request for an HTML page followed by multiple requests for each image on that page 非谓语形式的用法I have just received a letter from my old school,informing me that my former headmaster,Mr.Stuart Page,will be retiring next week.我想把informing me that 换成是 informed that my former headmaster,Mr.Stuart Page,will be r 时态It's important that i _____ with Mr.Williams immediatelyA speakB spokeC will speakD to speak望详解 page page. will that do 什么意思,求大神详解 请问这句话的informing me that my former headmaster怎么理解做什么成分I have just received a letter from my old school,informing me that my former headmaster ,Mr Stuart Page ,will be retiring next week. 请帮我分析一下下面句子中informing这个分词是作什么句子成分,I have just received a letter from my old school,informing me that my former headmaster,Mr Strart Page,will be retiring next week. 详解,同求详解. 情态动词大聚会（should,need,must,will,can,could,hav to,may,would)1.____ we go now,Mr Li——Yes,you can2.You have tried your best,so you __(not)worry about it.3.Remember to come here on time.——I __4.There is something wrong with the door The sports meeting___next sunday.( ) A happens B will be taken place C will take place D will hold求详解 Mr.Li,he will forgive you will find the story at an eighth page 翻译