【SAT文法】这句话为什么不用完成时?When we counted the growth rings in the ancient redwood stumps,we found that the life of each of these trees spanned many centuries of history.为什么不用had spanned?如果都对的话区别是什

【SAT文法】这句话为什么不用完成时?When we counted the growth rings in the ancient redwood stumps,we found that the life of each of these trees spanned many centuries of history.为什么不用had spanned?如果都对的话区别是什 I didn't recognize you 为什么不用完成时这句话为什么不用完成时? I forgot to put you off.这句话里为什么不用完成时? He worked here for eight years!这句话中有for,为什么前面不用完成时态? 英语为什么这道题不用完成时 I visited museum and sat in public gardens.这句话里面为什么要加sat呢? SAT语法 #13 一个时间段内不用完成时?#24 A没错?哪个是主句?#27 哪SAT语法 #13 一个时间段内不用完成时?#24 A没错?哪个是主句?#27 什么意思?哪个主句?#29 D错哪? draw变成现在进行时为什么不用双写W she sat down and accepted a cup of very strong tea,while he telephoned the police.这句话里面while he telephoned the police为什么要用while不用when 不是说表达某个动作时用when 而某个动作正在发生时用while 但是这句话 how long did it last 为什么不用完成时 变成how long has it lastedhow long提问的后面一般都用完成时啊可是为什么在这句话里边通常都是用过去时呢? 这句话有to this day 却为什么没有用完成时?To this day there is no evidence that the disease is spread by mosquitoes.为什么不用there has been?求解释 急求2011年5月SAT文法答案 the little boy sat there ,silent为什么不用silently in the evening,the family sit down to a big goose dinner为什么不用过去时?还有为什么不用复数?sit过去式不是sat 请问这句话怎么解释SAT 文法一定是指代明确的 In eighteenth-century France,ecomic inequalities made many people (angry,and a violent revolution was fueled.)A.angry,and a violent revolution was fueledB.angry;it fueled a violent revol She watched TV until her mother came back.这句话为什么前面不用过去进行时? She watched TV until her mother came back.这句话为什么前面不用过去进行时? 这句话对吗?为什么不用Feel?If you sense something