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past perfect tense (过去完成时 )过去完成时表示一个动作或状态在过去某一时间或动作之前已经完成或结束,也可能是早已完成或结束,即“过去的过去”;也可以指过去的动作延续到过去的某个时刻. 过去完成时由“had +动词的过去分词”构成, had通常用于任何人称.过去完成时主要有以下几点用法 1. 表示过去某一时间或...
Simple past tense and present perfect tense一般过去时和现在完成时There are some differences between the一般过去时和现在完成时之间有一些simple past tense and the present perfect区别。tense.. We use the simple past tense to tell what我们使用一般过去时来讲述过去发生happened in the past.的事情。Daniel...
The past tense is used for a past activity or a past state of being. The past tense is categorized further depending on whether the action was in progress or has been completed. The four past tenses are the simple past tense, the past progressive tense,
e.g.Danielboughtanewcomputerlastmonth.Mr.WuvisitedCanadain2010and2011 GO Timeexpressionsusedwiththesimplepasttense:yesterdaythedaybeforeyesterdaytheotherdayin2012…agoCanyoumakeasentencewithoneoflast…thesewordsorphrases?inthepast… e.gIhavelivedheresinceIwasborn...
Past simple tense and present perfect tense Pastsimpletenseandpresentperfecttense 一般过去时态与现在完成时态 Usefulsentences It’s/hasbeensixyearssincewelastsaweachother.JohnandXiaoLihaven’tseeneachotherforsix years.This/It/ThatisthefirsttimeIhavevisitedyour hometown.ThisisoneofthemostattractiveplacesI...
【题目】Simple past and present perfectTenseUsed forExampleactions that happenedI bought a new bicycle yesterday.in the pastSimple pastactions that happenedKitty wrote an email to Linda anat a certain time inhour ago.the pastemphasizing the resultI have bought a new bicycle, so Iof a past ...
【题目】Simple past tense and present perfect tenseThere are some differences between the simple past tenseand the present perfect tense.TIPWe often use these time expressions with the simplepast tense.yesterday the other day last.. .agoTIPWe often use these time expressions with the present...
Past Tense Examples The sample sentences below illustrate how to use the four types of past tenses described above: simple past, past progressive, past perfect, and past perfect progressive. Simple Past Idescribedmy favorite plants and trees in science class. ...
1)Past tenseThe demand for energy dropped steadily between 1985 and 1990 from 5 units of energy to approximately 2 units.2)Present tenseThe demand for energy dropps steadily between 5 units of energy to approximately 2 units.3)past participleThe demand for energy has dropped steadily between ...