in grammar , a word which is used before a noun , a noun phrase or a pronoun , connecting it to another word
发音
例句
1. You should cancel this preposition in the sentence. 你应该删去句子中的这个介词。 2. We use different preposition to talk about time, days, months and seasons. 我们用不动的介词来谈论时间,日,月和季节等。