时间状语常用since加一个过去的时间点,或for加一段时间,或by加一个现在时间。 例:Great as Newton was, many of his ideas have been challenged today and are being modified by the work of scientists of our time. 虽然牛顿是个伟大的人物,但他的许多见解直到今...
时间状语常用since加一个过去的时间点,或for加一段时间,或by加一个现在时间。 例:Great as Newton was, many of his ideas have been challenged today and are being modified by the ...
一般现在时 一 1. 概念:经常、反复发生的动作或行为及现在的某种状况。 2. 基本结构:①is/am/are;②do/does 否定形式:①am/is/are + not;②此时态的谓语动词若为行为动词,则在其前加don t,如主语为第三人称单数
因为多种时态的正确应用也可以体现出你的grammatical range!接下来我们来看一下考官范文中的完成时是怎么用的吧～ 示例一 Consumption has fluctuated since 1990 but both now provide...
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