The present perfect simple is often used to talk about past actions and events which are completely finished.

一般现在完成时经常用于谈论过去的行为和事件其完全结束。

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Fill in the blanks with verbs given in the Simple Future, the Future Proguessive or the Future Perfect Simple.

用所给动词的一般现在时，将业进行时或将来完成时填空。

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Seems very simple, but took Beethoven a long time to iron all this out and make this perfect melody, the prototypical melody in a way.

似乎很简单,但是花了贝多芬很长时间来琢磨,最后做出这段完美的旋律,这段典范旋律

耶鲁公开课 - 聆听音乐课程节选

Deceptively simple but perfect for this time of year is Adin Steinsaltz's Simple Words , a series of short essays about what it means to be human in a material world.

NPR: The Least Material of Material Gifts

Spend more time with the software, though, and you realize while Google Translate is often spot-on perfect, especially with simple sentences from structurally simple languages like Spanish, it can produce puzzling sentences.

FORBES: Magazine Article

The inspiration for QUE was an age-old but perfect business tool: a simple sheet of paper.

ENGADGET: Plastic Logic debuts QUE proReader, shows off truVue publications