查询词典 past perfect

Present tense simple, present tense progressive, past tense simple, past tense progressive, present perfect, past perfect.

目前的紧张简单，目前紧张的进步，过去式简单，过去紧张的进步，目前十全十美的，过去的完美。

The Past Perfect Tense is formed by combining the auxiliary verb 'had' with a past participle.

过去完成时态的形成方式是把助动词'had'及过去分词结合起来。

To say what you wish about the past , you use the past perfect

要表达对过去的希望，用过去完成式

The past perfect is an action in the past that occurred before a separate action in the past.

过去完成式就是在过去某个时间发生的事情之前所发生的事情。

We can use the past perfect tense to talk about an action that happened before another action in the past.

我们可以用过去完成时态来谈论在过去某个时间之前完成的动作。

When you want to express regret about past events, you use the past perfect.

与过去完成时搭配可表示对过去事情的遗憾。

And this semester, we have learned the past tense, the past perfect tense and the future tense and so on.

这个学期，我们学到了过去时，现在完成时，过去完成时和将来时等。

We use the past perfect continuous tense to show that an action started in the past and continued up until another time in the past.

我们用过去完成进行时态来形容一个在过去开始的行动，这个行动持续到过去的另一个时间。

The present and past perfect tenses both belong to the perfect tense.

现在完成时和过去完成时都属于完成时态。

The present and past perfect tenses both belong to the perfect tense.

现在完成时和过去完成时都属于完成时态。v。使完美，促进

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。