看了楼上们的发言,我感觉大家其实还是应该把OG的解释看仔细先,OG解释本身就能解决好几位XDJM的问题。 In which or when can be used interchangeably in this sentence. 前者引导的是定语从句,后者引导的是引导时间状语从句。(这个理解对吗?) The verb form here should be the simple past existed rather than the past perfect had existed. 时态上之所以用一般现在时,我认为有两个原因:1. “the concept of an age in which/when...”所叙述的是一个“真理”或者“事实”,应该用一般现在时/一般过去时,而现在时和过去时由age决定。根据句义,这个age应该是发生在过去,所以用一般过去时;2. 主句谓语动词为动词短语lead sb. to do sth.——led L.A. to propose the concept of an age...,而the concept of an age是propose的宾语,所以和主句谓语动词lead的时态无直接联系;3. 定语从句只有一个谓语动词exist,并没有出现另外一个发生在exist之后的过去的动作,所以exist不需要使用过去完成时。 Now currently is redundant because both adverbs express the same idea. A Had existed should be existed; now currently is redundant B Correct. The simple past verb tense is correctly used in this sentence; now is placed and used correctly. C Where there were areas now temperate is wordy and confusing D Had existed should be existed; current should be currently; in current temperate areas is unclear[current temperate areas的说法不正确。这种说法只有在current 和temperate都修饰areas的时候才正确;但是,current areas显然不合理。正确的说法是currently temperate areas,用副词currently 修饰temperate,意思为“现在气候温和的地区”] E Now is an adverb and should be placed just after the verb are. [正确说法为:when great ice sheets existed in areas that are now temperate] 希望大家踊跃指正! |