这个笔记基本上都是用英文,其实用英文讲英文语法会比较好理解 (更新中。。。)
Simple past and present perfect一般过去时和现在完成时TIP提示We often use these words with the present perfecttense.我们经常把这些词语和现在完成时连用。justalreadyuptonnωw刚刚已经到目前为止until/till nowever(not)yet直到现在曾经还(没有)so farrecently迄今为止最近TenseUsed forExample时态用于例子actions...
We form the present perfect with the verb 'have' and the past participle of the main verb. So the main verb here is 'achieve' and 'have' is an auxiliary or help verb. 我们用动词 have 和主动词的过去分词构成现在完成时。所以这里的主动词是 achieve,而 have 是助动词或辅助动词。 It helps...
1, switch off 关掉，是一瞬间发生的事，不可以延续，不会从出去之间一直关灯到现在，所以不能用present perfect tense。2, 由于给了I live in New York now.( 我现在住在纽约。），所以我在墨西哥住了许多年，却不能住到现在，不能用现在完成时（present perfect tense) 。3, Before that she ...
past是个介词和副词，而pass是个 这两个词好比across 与cross 一个能单独使用 一个不行 perfect 做名词用就是完美 的意思 做形容词就是完美的 理想的 的意思 present做形容词是出席的 到场的 做名词用就是目前啊 现在啊（一般at present=at the moment =now) 做动词用就是显示 出现...
I haveborrowedyour books for three daysborrowed 是瞬间动词 × I havekeptyour books for three dayskept 是持续性动词,用于这里更为恰当 √ # 后续需要大量记忆的过去式和过去分词不规则变化表(这个熟练的记忆和使用,才是过去时和现在完成时的入门基础!!!)...
Some of the most confusing tenses in the English language are the present perfect and past perfect. They become especially confusing when you have to identify which
Students often confuse the present perfect and past simple tenses. We use the past simple when we include a past time expression to say when in the past an event took place. ✓Yesterday I ate rice. ✗Yesterday I have eaten rice. ...
past continuous:i was reading newspaper at 7o'clock yesterday. present continuous:i am reading newspaper now. present perfect continuous:i have been learning english for 2 years. present simple:i like cats. past simple:i went to school yesterday. present perfect:i have finished my homework.反馈...
只是时间不同， present perfect 是过去发生的事一直持续到现在或有可能继续下去，过去发生的事对现在造成的影响。past perfect是过去的过去发生的事一直持续到过去的某个时或有可能继续下去，