An adverb is a part of speech. It is any word that modifies any other part of language: verbs, adjectives (including numbers), clauses, sentences and other adverbs, except for nouns; modifiers of nouns are primarily determiners and adjectives.
Adverbs typically answer questions such as how?, when?, where?, why? and to what extent?']
This function is called the adverbial function, and is realized not just by single words (i.e., adverbs) but by adverbial phrases and adverbial clauses.
An adverb as an adverbial may be a sentence element in its own right.
They treated her well. (SUBJECT)
Alternatively, an adverb may be contained within a sentence element.
An extremely attractive woman entered the room. (SUBJECT + ADVERBIAL + OBJECT)
In English, adverbs of manner (answering the question how?) are often formed by adding -ly to adjectives. For example, great yields greatly, and beautiful yields beautifully. (Note that some words that end in -ly, such as friendly and lovely, are not adverbs, but adjectives, in which case the root word is usually a noun. There are also underived adjectives that end in -ly, such as holy and ugly.) The suffix -ly derives from an Anglo-Saxon word meaning "like".
In some cases, the suffix -wise may be used to derive adverbs from nouns. Historically, -wise competed with a related form -ways and won out against it. In a few words, like sideways, -ways survives; words like clockwise show the transition. Again, it is not a foolproof indicator of a word being an adverb. Some adverbs are formed from nouns or adjectives by appending the prefix a- (such as abreast, astray). There are a number of other suffixes in English that derive adverbs from other word classes, and there are also many adverbs that are not morphologically indicated at all.
Comparative adverbs include more, most, least, and less (in phrases such as more beautiful, most easily etc.).
The usual form pertaining to adjectives or adverbs is called the positive. Formally, adverbs in English are inflected in terms of comparison, just like adjectives. The comparative and superlative forms of some (especially single-syllable) adverbs that do not end in -ly are generated by adding -er and -est (She ran faster; He punches hardest). Others, especially those ending -ly, are periphrastically compared by the use of more or most (She ran more quickly). Adverbs also take comparisons with as ... as, less, and least. Not all adverbs are comparable; for example in the sentence He died yesterday it does not make sense to speak of "more yesterday" or "most yesterday".
Adverbs as a "catch-all" category
Adverbs are considered a part of speech in traditional English grammar and are still included as a part of speech in grammar taught in schools and used in dictionaries. However, modern grammarians recognize that words traditionally grouped together as adverbs serve a number of different functions. Some would go so far as to call adverbs a "catch-all" category that includes all words that don't belong to one of the other parts of speech.
A more logical approach to dividing words into classes relies on recognizing which words can be used in a certain context. For example, a noun is a word that can be inserted in the following template to form a grammatical sentence:
The _____ is red. (For example, "The hat is red.")
When this approach is taken, it is seen that adverbs fall into a number of different categories. For example, some adverbs can be used to modify an entire sentence, whereas others cannot. Even when a sentential adverb has other functions, the meaning is often not the same. For example, in the sentences She gave birth naturally and Naturally, she gave birth, the word naturally has different meanings (actually the first sentence could be interpreted in the same way as the second, but context makes it clear which is meant). Naturally as a sentential adverb means something like "of course" and as a verb-modifying adverb means "in a natural manner". The "hopefully" controversy demonstrates that the class of sentential adverbs is a closed class (there is resistance to adding new words to the class), whereas the class of adverbs that modify verbs is not.
Words like very and particularly afford another useful example. We can say Perry is very fast, but not Perry very won the race. These words can modify adjectives but not verbs. On the other hand, there are words like here and there that cannot modify adjectives. We can say The sock looks good there but not It is a there beautiful sock. The fact that many adverbs can be used in more than one of these functions can confuse this issue, and it may seem like splitting hairs to say that a single adverb is really two or more words that serve different functions. However, this distinction can be useful, especially considering adverbs like naturally that have different meanings in their different functions.
Adverbs typically answer questions such as how?, when?, where?, why? and to what extent?']
This function is called the adverbial function, and is realized not just by single words (i.e., adverbs) but by adverbial phrases and adverbial clauses.
An adverb as an adverbial may be a sentence element in its own right.
They treated her well. (SUBJECT)
Alternatively, an adverb may be contained within a sentence element.
An extremely attractive woman entered the room. (SUBJECT + ADVERBIAL + OBJECT)
In English, adverbs of manner (answering the question how?) are often formed by adding -ly to adjectives. For example, great yields greatly, and beautiful yields beautifully. (Note that some words that end in -ly, such as friendly and lovely, are not adverbs, but adjectives, in which case the root word is usually a noun. There are also underived adjectives that end in -ly, such as holy and ugly.) The suffix -ly derives from an Anglo-Saxon word meaning "like".
In some cases, the suffix -wise may be used to derive adverbs from nouns. Historically, -wise competed with a related form -ways and won out against it. In a few words, like sideways, -ways survives; words like clockwise show the transition. Again, it is not a foolproof indicator of a word being an adverb. Some adverbs are formed from nouns or adjectives by appending the prefix a- (such as abreast, astray). There are a number of other suffixes in English that derive adverbs from other word classes, and there are also many adverbs that are not morphologically indicated at all.
Comparative adverbs include more, most, least, and less (in phrases such as more beautiful, most easily etc.).
The usual form pertaining to adjectives or adverbs is called the positive. Formally, adverbs in English are inflected in terms of comparison, just like adjectives. The comparative and superlative forms of some (especially single-syllable) adverbs that do not end in -ly are generated by adding -er and -est (She ran faster; He punches hardest). Others, especially those ending -ly, are periphrastically compared by the use of more or most (She ran more quickly). Adverbs also take comparisons with as ... as, less, and least. Not all adverbs are comparable; for example in the sentence He died yesterday it does not make sense to speak of "more yesterday" or "most yesterday".
Adverbs as a "catch-all" category
Adverbs are considered a part of speech in traditional English grammar and are still included as a part of speech in grammar taught in schools and used in dictionaries. However, modern grammarians recognize that words traditionally grouped together as adverbs serve a number of different functions. Some would go so far as to call adverbs a "catch-all" category that includes all words that don't belong to one of the other parts of speech.
A more logical approach to dividing words into classes relies on recognizing which words can be used in a certain context. For example, a noun is a word that can be inserted in the following template to form a grammatical sentence:
The _____ is red. (For example, "The hat is red.")
When this approach is taken, it is seen that adverbs fall into a number of different categories. For example, some adverbs can be used to modify an entire sentence, whereas others cannot. Even when a sentential adverb has other functions, the meaning is often not the same. For example, in the sentences She gave birth naturally and Naturally, she gave birth, the word naturally has different meanings (actually the first sentence could be interpreted in the same way as the second, but context makes it clear which is meant). Naturally as a sentential adverb means something like "of course" and as a verb-modifying adverb means "in a natural manner". The "hopefully" controversy demonstrates that the class of sentential adverbs is a closed class (there is resistance to adding new words to the class), whereas the class of adverbs that modify verbs is not.
Words like very and particularly afford another useful example. We can say Perry is very fast, but not Perry very won the race. These words can modify adjectives but not verbs. On the other hand, there are words like here and there that cannot modify adjectives. We can say The sock looks good there but not It is a there beautiful sock. The fact that many adverbs can be used in more than one of these functions can confuse this issue, and it may seem like splitting hairs to say that a single adverb is really two or more words that serve different functions. However, this distinction can be useful, especially considering adverbs like naturally that have different meanings in their different functions.