America has been discovered by Columbus in 1492 D. America were discovered by Columbus in 1492 相关知识点: 试题来源: 解析 A。解析:原句是一般过去时主动语态,变为被动语态的结构为“be动词(过去式)+动词过去分词”,discover的过去分词是discovered,这里主语America是单数,一般过去时的be动词要用was,A选项...
C. America has been discovered by Columbus in 1492. D. America will be discovered by Columbus in 1492. 相关知识点: 试题来源: 解析 B。解析:原句为一般过去时主动语态。在转换为被动语态时,原句的宾语America作主语,原句的动词discover变为被动形式。一般过去时的被动语态结构是was/were+过去分词,这里...
这里“discovered”是“discover”的过去式,America是原句宾语,被动语态是America was discovered by Columbus in 1492。B选项是一般现在时,C选项是过去完成时,D选项是现在进行时,都不符合原句时态。反馈 收藏
Sturgis, Amy H
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