present perfect 加has/have+past participle 而present perfect progressive has/have+been+verb+ingparticiple 过去分词 扫码下载作业帮搜索答疑一搜即得 答案解析 查看更多优质解析解答一 举报present perfect 和 present perfect continuous 的最大区别在: 前者表示某事情在过去已经完全完成,可不知道确定时间....
1、1 现在完成时 Present perfect 接触一:肯定句式 现在完成时的肯定句式是“have(has)过去分词”。如: We have just finished our homework She has gone home 注意:1)该句式中的have或has是助动词,has用于第三人称单数,其它人称一律用have。 2)该句式中have(has)和过去分词之间可用just插入。 3)把该句式...
Present Perfect Continuous (have/has + been + V-ing) Wed, 26 March 2008 Compare these sentences I have been repairing the TV for hours I have repaired the TV. Are you happy? (1) the activity is being spoken about and we are not sure if the TV is fixed yet or not. (2), there ...
解答一 举报 present perfect 是现在分词,通俗地说就是ing形式,比如I am climbling the mountain ,其中climbling就是现在分词.而问题中的climb+ed是做过去分词使用,即past perfect .过去分词对于规则动词而言就是直接+ed的,climb... 解析看不懂?免费查看同类题视频解析查看解答 更多答案(1) ...
【题目】 Write the questions in the Present Perfect Tense Use have or has and the correct form of the verbs given. camel have has you rlde ever A: Have you ever ridden a camel? B: Yes. once 2 ever you in a balloon have has fly A: Have you ever flown in a balloon? B: Yes,...
It may have just happened or happenedsome time ago.Daniel has bought a new computer.(Daniel has a new computer now.)pastpresentWe use the simple past tense to tell what happened inthe past.Mr Wu visited Canada in 2010 and 2011.pastpresentWe use the present perfect tense to tell how many...
现在完成时(present perfect tense)共20页 现在完成时（presentperfecttense）51、山气日夕佳，飞鸟相与还。52、木欣欣以向荣，泉涓涓而始流。53、富贵非吾愿，帝乡不可期。54、雄发指危冠，猛气冲长缨。55、土地平旷，屋舍俨然，有良田美池桑竹之属，阡陌交通，鸡犬相闻。谢谢！51、天下之事常成于困约，...
present perfect is used: when some past action very recently completed/happened, or is still happening, and when you do not want to place the time specifically. if it started and ended in the past and/or is specific in time, you would use the simple past
today - the present time or age; "the world of today"; "today we have computers" tonight - the present or immediately coming night 2. present - something presented as a gift; "his tie was a present from his wife" gift - something acquired without compensation birthday gift, birthday pres...
I have often wondered where she gets her money all these days. 这种用法从时间上与现在发生了联系。现在完成时现在完成时vsvs现在完成进行时现在完成进行时 1. 现在完成进行时的主要用法与现在完成时的“未完成”用法相似。在与表示一段时间的状语连用时,现在完成时和现在完成进行时都可以表示一个动作从过去某...