What's the difference between English prepositions and adverbs?

Prepositions indicate the relationship between nouns and pronouns. And other words in the sentence, but not as sentence components alone in the sentence. Prepositions are usually followed by nouns, pronouns or other parts of speech, phrases or clauses equivalent to nouns as objects, indicating the relationship with other components. Adverbs refer to words that express the characteristics of behavior or state in a sentence, which are used to modify verbs, adjectives, other adverbs or the whole sentence and express concepts such as time, place, degree and way.

Classification of prepositions

(1) Simple prepositions include in, on, with, by, for, at, about, under, of, to and so on.

(2) Synthetic prepositions include into, inside, through, inside, outside, without, etc.

(3) Overlapping prepositions contain from...；; From behind, from behind; Until after until after; Around ...; Wait a minute or so.

(4) Phrase Prepositions One or two simple prepositions and one or several other parts of speech form a phrase, which is equivalent to a preposition. This is called a phrase preposition. This preposition always ends with a simple preposition. Such as according to, because of, through, in addition to, in front of, regardless of, into, etc.

(5) There are few prepositions with the suffix "-ing", which are similar to the present participle (some can be used as participles). Commonly used are: consideration, respect, respect, including.

Classification of adverbs

(1) twice frequency adverb: now, then, often, always, naturally, next, already, generally, often, rarely, once, however, soon, to.

(2) Adverbs of location: here, there, everywhere, anywhere, somewhere, in, out, inside, outside, above, below, up, down, behind, forward, home, etc.

(3) Adverbs of manner: carefully, appropriately (appropriately), anxiously (anxiously), suddenly, normally (normally), quickly, well, calmly (calmly), politely (politely), proudly (proudly), softly, etc.

(4) Adverbs of degree: more, less, very, quite (quite), so, too, still, quit, complete (perfect), pass, etc.

(5) interrogative adverbs: how, when, where and why.

(6) Connective adverbs: you (therefore), more (besides), besides, otherwise (otherwise) and so on.

(7) Relative adverbs: when, where and why.

(8) Adverbs indicating order: first, then, next, last, after, mainly, etc.