这句话中 will have left 是什么用法,这里有什么语法结构吗My train arrives in New York at eight o`clock tonight.The plane I would like to take from there will have left by them.
问题描述：
这句话中 will have left 是什么用法,这里有什么语法结构吗
My train arrives in New York at eight o`clock tonight.The plane I would like to take from there will have left by them.
答
时间状语从句，条件状语从句用一般现在时表示将来。
答
will have left是将来完成时的谓语结构,即：will have + 过去分词.
它用来表示在将来某一时间以前已经完成或一直持续的动作.经常与“before+将来时间”或“by+将来时间”连用.
翻译：我火车今晚八点才到纽约.我要从那（即纽约）转乘的飞机到那时（今晚八点）早就起飞了.
指飞机起飞这一动作在今晚八点（将来的时间）之前会已经完成,所以用将来完成时will have left.