Prepositions are words normally placed before nouns or pronouns and can also be followed by verbs but, except after but and except, the verb must be in the gerund form (Thomson, 1986: 91) A preposition is a words that links a noun or a noun equivalent (e.g. a pronoun or a gerund) to another word by expressing such relationships as location, direction, time, or purpose. (Longman,???????????????).Pr