A preposition is a virtual word that is used to indicate the relationship between a noun or pronoun and other words. In junior high school English, prepositions are an important grammatical knowledge point. Prepositions can be divided into the following categories:
1.Simple prepositions (**prepositions):
Simple prepositions are the most common prepositions that are used to denote concepts such as time, place, direction, cause, purpose, etc. Common simple prepositions are: in, on, at, by, to, from, withwithout, of, about, for, through, etc.
2.Compound prepositions:
Compound prepositions are made up of two or more words and denote more complex relationships. Common compound prepositions are: in front of, on top of, out of, because of, instead of, due to, etc.
3.Double prepositions:
A double preposition consists of two prepositions that formally look like a single preposition, but in fact it indicates the joint action of the two prepositions. Common double prepositions are: into, onto, upon, out of, up to, etc.
4.Separable prepositions:
A separating preposition is a phrase consisting of a preposition and a pronoun or adverb, and this preposition can be placed anywhere in the sentence. Common separation prepositions are: look after, take off, put on, get up, etc.
5.Conjunctive prepositions:
A conjunction-preposition is a preposition that is used to connect two sentences or phrases. Common conjunctional prepositions are: as, though, unless, etc.
6.Prepositional phrases:
A prepositional phrase consists of a preposition and the -ing form of a noun, pronoun, or verb that follows it. It can be used as a modifier of a noun, adjective, or adverb. For example: in the morning, on the table, by reading, etc.
7.implied prepositions:
An implicit preposition is a situation in which a preposition is omitted in certain fixed phrases. Common implicit prepositions are: look forward to, depend on, take care of, etc.
That's the classification of prepositions. Mastering the different types of prepositions and their usage is important for a proper understanding and use of the role that prepositions play in sentences. Hope the above information is helpful to you.