熊猫小胖
首先，你能提出这个问题说明你学英语很认真，值得我向你学习。下面说说我对这个问题的理解。＂a ＂不是介词，它在英语语法中叫做冠词（articles), 它的发音有两种。重读时发［ ei］或者 ［ e ］。如：" A " is an indefinite article. （＂A＂是个冠词。）这句中的＂A＂应该发［ ei ］。另一种读音在弱读时用，是e倒过来的音标，如：This is a book. ( 这是本书。）这个＂a＂应变倒 e音标。
lostinyoudaidai
介词又称作前置词，表示名词、代词等与句中其他词的关系，在句中不能单独作句子成分。介词后面一般有名词、代词或相当于名词的其他词类、短语或从句作它的宾语，表示与其他成分的关系。那么你知道介词用英语怎么说吗?下面来学习一下吧。
介词英语说法1：
preposition
介词英语说法2：
prep
介词的相关短语：
介词宾语 Objects of Prepositions ; prepositional object ; the vast sums ; OPREP
复合介词 Compound Preposition ; Complex Preposition
介词句式 preposition phrasing
介词动词 prepositional verb ; Phrasal-prepositional Verb
短语介词 Phrasal Preposition
介词的英语例句：
1. She lays a lot of emphasis on the usage of prepositions.
她把重点放在介词的使用上.
2. The word is compounded of a preposition and a verb.
这个词是由一个介词和一个动词复合而成的.
3. Prepositions and conjunctions are particles.
介词和连词是小品词.
4. Three plus six makes nine.
3加6等于9.(注意,此句中的plus是 介词,plussix是介词短语,作three的 定语,因此,动词用makes, 不用make ) .
5. There is nothing in the rules of grammar to suggest that ending a sentence with a preposition is wrong.
语法规则中并没有规定句子以介词结尾是错误的。
6. The teacher asked us to fill in the blanks with prepositions.
老师叫我们在空白处填入介词.
7. The words'in ','from','out'and'of are prepositions.
in, from, out,以及of都是介词.
8. You should cancel this preposition in the sentence.
你应该删去句子中的这个介词.
9. Fill in the blank with prepositions.
用介词填空.
10. So that each preposition can stay out the emptiness to go to fill up by reader.
各介词可以留出空白以便让读者去填入.
11. Second, The ad position description about Secret history of the Mongols.
贰 、 《元朝秘史》总译部分介词的描写.
12. Preposition - like adverbial particles are a special class of words in English.
英语中形似介词的副词小品词是一类比较特殊的词.
13. Moreover, the locative environment is mainly realized a locative prepositional phrase.
另外, 处所环境主要由处所介词短语加以体现.
14. Anglo - Saxon was an inflective language; there was lack of prepositions and articles.
古英语是屈折变化的语言, 缺少介词和冠词.
15. Some verbs do not take an object and are a preposition.
有些动词后面不跟宾语,而是与介词搭配.
