Common prepositions in prepositional phrases.
This is a list of the most common prepositions.
Prepositions are always linked to a nominal. A prepositon followed by a nominal is called a prepositional phrase or a prepositional group.
 A preposition at the start of a sentence  tells us  that its following nominal is not the subject     (because it is part of a prepositional phrase and so it   must be an adverbial.  Prepositional phrases are   usually adverbials - and never subjects).
Prepositions can indicate position or direction.
Some prepositions which are used for times and dates are also used for expressing place.
Many learners of English find prepositions very confusing because some prepositions have different meanings, and it is difficult to know which preposition is used in each situation.
Prepositional phrases are not always adverbials; they are often part of nominal groups. Usually the preposition follows a noun, giving more information about it.
9 The preposition 'of'
Most prepositons are just one word, but some are two, three or four words long, for example: 'according to', 'because of', 'in spite of' and 'out the back of'.
Questions may end with a prepositon.
Relative clauses sometime end with an prepositon.
Some prepositions can also be adverbs. If one of these is followed by a nominal, it is a preposition. If not it is an adverb.
Some prepositions can also be conjunctions. If one of these is followed by a clause, it is a conjunction. If it is simply followed by a nominal, it is a prepositon.
Some verbs are followed by a prepositional phrase - instead of a direct object. It is a good idea to learn each verb with its preposition.
Examples of prepositional verbs
Some verbs are followed by a preposition, which changes the meaning of the verb. These are called phrasal verbs.
18 Nouns with prepositions
19 List of nouns with their (dependent) prepositions
20 Adjective and preposition
21 List of adjectives with prepositions