阐述了科技论文中英文摘要的语言结构特点、时态和语态的正确运用及独特的写作要求。
This paper describes the language characteristics, the structures, the correct application of tense and voice and the unique writing requirements of English abstract in scientific research papers.
不定式可以带宾语或状语构成不定式短语，没有人称和数的变化，但有时态和语态的变化。
Infinitive form can take object or adverbial infinitive phrase, there is no person and number of changes, but sometimes tense and voice changes.
介绍了商务合同的概念与内容，从措词、结构、时态和语态等方面分析了英语商务合同的语言特征。
This paper introduces the concepts and contents of commercial contract, and analyzes the language features of English commercial contract from the wording, structure, tense and voice.
对英文题名的结构和字数要求以及英文摘要的时态和语态进行了分析，对容易出错的冠词、介词、数词、单复数、标点符号等问题进行了说明。
In addition, it explains some aspects which are easy to be used incorrectly, such as articles, prepositions, numerals, singular and plural forms of nouns and punctuation marks.
用词多数比较正式，用语力求准确，多用主动语态、现在时态、直接表达方式和条件句等。
Formal words are used. The language accuracy is required. Active voice, present tense, direct expression and conditional clauses are more frequently used.
英语动词涉及四大语法范畴，包括时态，语态，式态，和体态。
We know that the English verb involves four grammatical categories, including tense, voice, mood and aspect. Aspect is the internal structure expressed by the contextualized verbs.
句法层上，英语娱乐新闻则通过对扩展的简单句、主动语态、引语和重复的频繁使用以及省略和时态的特殊用法来实现前景化；
Syntactic foregrounded features are embodied in the adoption of ellipsis and the peculiar use of tense, and also the frequent use of expanded simple sentences, active voice, quotations and repetition.
句法层上，英语娱乐新闻则通过对扩展的简单句、主动语态、引语和重复的频繁使用以及省略和时态的特殊用法来实现前景化；
Syntactic foregrounded features are embodied in the adoption of ellipsis and the peculiar use of tense, and also the frequent use of expanded simple sentences, active voice, quotations and repetition.
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