75. Salt deposits and moisture threaten to destroy the Mohenjo-Daro excavation in akistan, the site of an ancient civilization that flourished at the same time as the civilizations in the Nile delta and the river valleys of the Tigris and Euphrates. (A) that flourished at the same time as the civilizations - • - ` (B) that had flourished at the same time as had the civilizations (C) that flourished at the same time those had (D) flourishing at the same time as those did (E) flourishing at the same time as those were Verb form + Agreement gyp` t - . The underlined portion of the sentence is a relative clause that describes an ancient civilization; the clause correctly uses the simple past tense, flourished, to describe civilizations that existed simultaneously. A Correct. In this sentence, the relative clause correctly uses the simple past tense. B Use of the past perfect, had flourished, is incorrect because it indicates a time prior to another action; the second had is redundant and unnecessary
白勇用法上讲过: 1、主从句主谓相同的,从句可以把主谓都省了,只保留介词短语;i 2、主从句中谓语相同的,从句谓语可以省,用do,did ,does等代替。请问 a选项as后怎么就没有动词呢? 3、主从句都使用助动词(have,has,had)或情态动词的,则从句往往省略动词,保留助动词和情态动词。那么为什么og说b选项的had是多余的呢? 比较从句的省略规则到底是怎么的啊?谢谢nn! |