prepostions

Prepositions are used before nouns or pronouns to show relationships with other words, indicating time, place, or conditions. Some common examples of prepositions are:  at, by, for, from, in, into, on, to, with, between, since, etc. 

Let's explore their general rules.

General rules about the use of the most common prepositions

 

There are occasions in English when no preposition is used.  Some examples of these words are:  inside, outside, downstairs and upstairs.

Recommended Reference:

Swan, M. (20050. Practical English usage (3rd ed.). Oxford University Press.