0 in grammar, a word that is used before a noun, a noun phrase, or a pronoun, connecting it to another word -- 介系詞，前置詞
In the sentence 'The dog jumped over the wall', the word 'over' is a preposition.
Some prepositions consist of more than one word, such as 'out of'.
This is unproblematic in the case of major lexical categories and perhaps also in the case of prepositions.
They found that children with language impairments made more errors during the production of verb particles than for prepositions.
Prepositions fall into two subclasses : the so-called primary and secondary prepositions.
Unfortunately, the primary prepositions would still act exceptionally on either level.
The primary prepositions in nonbranching structures fall outside this hierarchy.
As pointed out above, more than the other two gerund types, definite nominal gerunds tend to co-occur with prepositions other than the most frequent six.
