杭州交通信息网可爱小马卡通图片大全:几道英语选择题请大家帮帮忙并说一下理由谢谢
来源：百度文库 编辑：杭州交通信息网 时间：2024/04/29 22:43:04
1.Charles' grandma_______for over two years
A.has died B.was dead C.has been dead
2.______Mary was doing her homework,the other children were playing outside.
A.When B.While C.As
A.has died B.was dead C.has been dead
2.______Mary was doing her homework,the other children were playing outside.
A.When B.While C.As
第一题选C,因为后面有时间段，所以需要跟完成式的延续性形式，于是选C.
A是不延续的,而B既不是完成,也不延续.
第二题选B,当时间状语为be doing或延续的动作时,用while
1.c 2.b
死这个词是非延续性动词，不能和一段时间状语连用。
while 表示一段
C 后面有时间状语for over two years 是延续性的动作，应该用现在完成时，所以AB错误
B 当马力做家庭作业的时候其他的孩子们正在外面玩耍。有强烈的对比，只能用while
同意三楼的