的过去式

This is a more complicated story than just the loss of some fictitious arcadian past.

这不仅仅是丧失了想象中过去田园式的生活，事实上情况比这更为复杂。

This single word itself is a perfect passive verb.

这是一个过去完成式的动词。

Discard the common things, focus on the narrate of particular and aberrance things; Use the description of present and future tense to give us a feeling of reality which shows the irresistible of foreordination. Fully shows the theme of "Tragedy Foreordination "; Through the change of visual angle make the narrate naturally revealed; Use the nicety and pithiness image description impel reader's expand of emotion; Through the exactitude language to break the normal sense of emotion.

余华用重复与循环的结构去成就特殊的人物命运，抛弃现实常规事件，钟情于对非常规及变异事件的叙述；以一种现在式或过去将来式的时间描述带来身临其境的感觉，展示了宿命的不可抗拒绝性，充分体现了"悲剧宿命"的主题；通过变化的视角让叙述以最自然的形态展示出来；使用准确有力的意象描写，推动读者情感发展；通过精准的语言表达，突破常规情感体验。

We use the present perfect of to be to say that someone has visited a place and come back.

记住当我们谈论过去的经历时。我们通常使用现在完成式。

We used to live in a terraced house

我们过去住在并列式的房子里

And as the literature mentioned, it is suitable for Anaerobic photosynthetic hydrogenic bacteria to treat the effluent of Anaerobic fermentative hydrogen production process, which contain massive volatile acid.

依据本研究室在过去四年的研究中发现，完全混合式CSTR反应槽最适合酦酵产氢反应，柱塞流式反应槽最适合光合产氢反应。

Ex : j Until now, I have not seen any audience.k Up to now, I have not been able to forget how nervous I wasat that time.

until now / up to now是表示从过去到现在的一段时间，因此要用「现在完成式」来表达。

Before and during second world war, gasifiers were largely used to power vehicles.

与木材或木炭来开动汽车，卡车，公共汽车，火车，船舶燃料下吸式气化炉的使用已经证明了它在过去磗价值。

Was brought about in part by industry's realization that the days of cut-throat competition and laissez faire are over.

部分是由于产业界了解割喉式竞争与放任经济政策的时代已经过去了。

The research of VCO attracts extensive attention of scientists all over the world, especially scientists working in the field of military science and technology. Types of improved VCO have appeared in the last two decades, such as, reflex triodes, reditrons, vircator with e-beam modulation, resonant cavity frequency locking vircators, multi-vircator phase locking devices, etc.

在过去二十多年中，出现了多种改进性能的虚阴极振荡器，如：反射三极管、Reditron、、谐振腔锁频虚阴极振荡器、多个虚阴极振荡器相位锁定装置、双间隙虚阴极振荡器、各种反馈式虚阴极振荡器等等。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。