have learned是什么时态,have you seen是什么时态

have learned是什么时态,have you seen是什么时态

Thanks again for what you have done for me. May you be blessed in everything you do. 2022年5月2日长难句分析97 —that短语总结今日原句As data and identity theft becomes这个是错的，首先have learned是现在完成时的时态，而yesterday是昨天，因此要用过去式，你可以写成I learned math yesterday.

learn和study有什么区别？为什么“We have learned English for two years”是错误的？如何表达“我们已经学会英语两年了”？一、learn和study有什么区别？learn [lɜːrn] v. 学习has learned是现在完成时态。has:有；have 的第三人称单数现在时形式。learned:adj. 有学问的；学到的；知识渊博的；博学的；(为)学者的；学术性的；学问精

二.一般过去时态1.结构肯定句式：主语+动词过去式+其他否定句式：主语+(助动词)didn’t +动词原形+其他一般疑问句式：Did+主语+动词原形+其他简略回答：(hello.everyone.it is really good to see you here.i am.,come from china.this is my first time to this beautiful country ,i am so delighted to have the opportunity to be

英语语法：“having learned”and “learning”分别Source: Zhihu(prepared by: alexcwlin; edited by: Adam Lam)Question:In one article, a reader wrote: “Having learnt thahavehasdown是什么时态现在完成时表示现在之前业已完成的动作虽然其效果或影响仍然存在但已不再继续但是有一些现在完成时的句子在后面加上for一段时间则现在完成时的动作就表

2、如：We had learned over two thousand English words by the end of last term. 3、before + 过去的时间点。如：They had planted six hundred trees before last Wedne是的，因为learn的过去式有两种变化