查询词典 past perfect

And it was perhaps the first time she had heard me give a lengthy speech, using the kind of English I have never used with her-a speech filled with carefully constructed grammatical phrases, burdened, it suddenly seemed to me, with nominalized forms, past perfect tenses, conditional phrases, all the forms of standard English that I had learned in school and through books, the forms of English I did not use at home with my mother.

这也许是她第一次听我长篇大论，用的是我从未在她面前用过的那种英语-演讲中满是精心构造的、合乎语法的词组，大量名词化结构，过去完成时，条件短语（这些我似乎是突然发现的）。所有这些我在学校和书本中学到的标准语言结构，都不是我在家里和母亲交谈时使用的英语形式。

Then, if we want to talk about things that happened before this time, we use the past perfect had

然而，当我们想表达事情发生再这事情的时间之前，我们使用现在完成。

Lin Yutang' s personality shaped the past perfect modality of China ' s cultural transformation on individual level.

林语堂的人格是中国文化转型在个体层面的完成时形态。

Usage We use the past perfect, Action 1 at the end.

我们用过去完成时，动作1在最后。

The past perfect is used for looking backwards in time.

因为这毕竟不是比赛，最后要评出一、二、三等奖。

When do I use the past perfect?

过去完成时

That are far from past perfect.

不太完美的过去完成式

The Past Perfect Tense is used to express an action or event that has already happened at a certain time in the past.

过去完成时是用来表达一个动作或者事件在过去的某个特定时间已经发生。

Practice the use of the simple past and the simple past perfect.

L14 合成带过去时及过去完成时的时间状语从句。

To introduce the use of past perfect tense to indicate the event happened before a particular time in the past.

Jodie他参加了一个大派对！到底发生了什麼事情呢？是谁在PARTY这麼伤心呢？进来看看吧！

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。