English prepositions and adverbs distinguish the definitions of prepositions and adverbs. Thank you.

Definition: put before nouns or noun equivalents to form ideographic units (phrases). A word used to explain the relationship between a noun or noun equivalent and other words in a sentence is called a preposition (also translated as a preposition). For example, at, by, in, of, on, to, with, because, in front and so on.

Nouns and pronouns after prepositions are called prepositional objects, and their ideographic units are prepositional phrases.

The expressive functions of prepositional phrases in sentences are as follows:

(1) is used as a noun, for example:

A mouse ran out from under the wall.

A mouse ran out from under the wall.

Explanation: The prepositional phrase "under the wall" serves as the object of the preposition "cong" in front of it in this sentence, so its function is equivalent to a noun. The prepositional phrase used in this way is called a noun phrase.

(2) used as adjectives, such as:

Bring me the book on your desk.

Bring me the book on your desk.

Commentary: The prepositional phrase "on your desk" modifies the noun "book" in this sentence, so its function is equivalent to an adjective. The prepositional phrase used in this way is called an adjective phrase.

(3) used as adverbs, such as:

They are studying quietly in the classroom.

They are reading quietly in the classroom.

Commentary: the prepositional phrase "in the classroom" modifies the verb "learning" in this sentence, so its function is equivalent to an adverb. The prepositional phrase used in this way is called an adverbial phrase.

Adverbs are words used to modify verbs, adjectives, adverbs or whole sentences, and explain concepts such as time, place, degree and manner.

Classification of auxiliary words:

1) adverbs of time and frequency:

Now, then, often, always, usually, early, today, recently, next, last, already, generally, often, rarely, once, never, however, soon, too, immediately, almost, finally, soon, before, before, sometimes, yesterday.

2) adverbs of place:

Here, there, everywhere, anywhere, in, outside, inside, outside, above, below, down, backward, forward, home, upstairs, downstairs, through, along, around, near, away, past, up, away, in.

3) Adverbs of Mode:

Carefully, properly, anxiously, suddenly, normally, quickly, well, calmly, politely, proudly, gently and enthusiastically.

4) Adverbs of degree:

More, less, very, quite, so, too, still, quite, perfect, enough, extremely, completely, almost, slightly.

5) interrogative adverbs:

How, when, where and why.

6) Relative adverbs:

When, where and why.

7) Connective adverbs:

How, when, where, why and whether.

Usage of auxiliary words:

Adverbs can be used as adverbials, predications and phrases in sentences.