20 - By notion, words can be grouped into content words and functional words. Content words denote clear notions and thus are known as notional words. They include nouns, verbs, adjectives, adverbs and numerals, which denote objects, phenomena, action, quality, state, degree, quantity.

20 -通过概念，词可以分为文字和内容功能的话。内容词表示明确的概念，因此被称为实词。它们包括名词，动词，形容词，副词和数字，这意味着物体的现象，采取行动，质量，状况，程度，数量。 21 - Functional words do not have notions of their own. Therefore, they are also called empty words. As their chief function is to express the relation between notions, the relation between words as well as between sentences, they are known as form words. Prepositions, conjunctions, auxiliaries and articles belong to this category.

21 -虚词没有自己的概念。因此，他们也呼吁空话。作为其主要职能是表达概念之间的关系，词与词之间的关系以及句子之间，他们被称为形式的话。介词，连词，辅助设备和物品属于这一类。

22 - However, functional words do far more work of expression in English on average than content words.

22 -但是，迄今虚词做更多的工作表达英文平均比内容的话。

23 - Native words are words brought to Britain in the fifth century by the German tribes; the Angles, the Saxons, and the Jutes, thus known as Anglo-Saxon words.

23 -母语词话使英国在15世纪由德国部落的角度，在撒克逊人，和朱特人，从而被称为盎格鲁撒克逊人的话。