By the time the fire engines arrived,the house__to the ground.a was burnedb has been burnedc had been burnedd should have been burnedby the time是用于对将来的假设还是什么呢?

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Bythetimethefireenginesarrived,thehouse__totheground.awasburnedbhasbeenburnedchadbeenburneddshouldha

By the time the fire engines arrived,the house__to the ground.a was burnedb has been burnedc had been burnedd should have been burnedby the time是用于对将来的假设还是什么呢?
By the time the fire engines arrived,the house__to the ground.
a was burned
b has been burned
c had been burned
d should have been burned
by the time是用于对将来的假设还是什么呢?

By the time the fire engines arrived,the house__to the ground.a was burnedb has been burnedc had been burnedd should have been burnedby the time是用于对将来的假设还是什么呢?
C by the time 是完成时的标志,即：从句出现by the time,主句要用完成时态.此题的从句是过去时态,所以主句使用过去完成时,若从句是现在时态,则主句用现在完成时.意思是：等到救火车到达的时候,房子早已烧尽了.

C By the time 要加完成时。前半句是用过去的时态，后一句房子被烧毁的状态在消防车到达之前已经发生了。要用过去完成时。

C。过去的过去就完成的动作用过去完成时

C,不是

The building___(destory) by fire The fire of my love for you would die out by the time goes! By this time ,the doctor had other irons in the fire 请帮我翻译一下 The house was d____ by fire. sit by the fire 怎么读 by the time ,by then By the time by the time Ten people ▁▁（injure or kill sb/sth by time）to death in the hotel fire 用by the time造句! by the time怎么造句? by the time +现在式造句 by the time 的用法 by the time 等于什么? by the time to 谢 by the time什么意思 By the time the fire engines arrived,the house__to the ground.a was burnedb has been burnedc had been burnedd should have been burnedby the time是用于对将来的假设还是什么呢? by the time the freemen arrived at the building,the fire ———by the nearby citizens.（put）消防员到达这栋大楼的时候,附近的市民已经把火扑灭了