The word she is a pronoun. It refers to a female.

The subject is normally a noun or a pronoun.

However, it may also be the infinitive or the gerund form of a verb, or a clause.

"John was happy." (John is the subject).

"To travel to Europe is always fun." (To travel is the subject)

"Riding in his car made John happy." (Riding is the subject)

Interrogative and indefinite pronouns can represent subjects using a linking verb.

"What was his answer?" (subject is answer)

"There are no solutions." (subject is solutions)

"It was a dark and stormy night." (subject pronoun it)

"That we tried is what is important." (subject pronoun that)

Imperative sentences have an understood subject, which is you.

"Clean up the room" (you should clean up the room now)

The subject of a sentence is the key and primary 'thing' that the writer/talker is writing/speaking about. In grammar, the word 'subject' refers to the person or thing that performs the action described by the verb.

For example, in the sentence "The cat sat on the mat", the verb is 'sat.'

So what thing performed the action of sitting? It was the cat.

So 'cat' is the subject in this sentence.

The complete subject of a sentence can be a noun phrase, meaning a phrase whose head word is a noun. The subjects in the following examples are enclosed between square brackets with the head noun italicized:

• [The new student] asked a question.
• [A question] was asked.
• [A student who studies linguistics] asked a question.
• Are [your students] enjoying the course?
• [He] thought that [the student] was very clever. (Here 'he' is the subject of the main clause and 'the student' is the subject of the embedded clause.)
• [I] expected [him] to go. (Here 'I' is the subject of the main clause and 'him' is the subject of the embedded clause 'him to go'.)

Various types of clauses can also function as the subject of a sentence when the main verb is a form of 'to be':

• [Playing cricket] is fun.
• [That I am alive] is obvious.
• [To leave now] would be a disaster.

Any kind of quoted text can also function as a subject when the verb is a form of 'to be':

• ["All work and no play"] was repeated on every page of the manuscript.

The term 'Health is wealth.' is a complete sentence made up of:

• subject = health (a common, uncountable, abstract noun)
• is = linking verb (a word for a state of being)
• predicate nominative = wealth (a common, uncountable, abstract noun)

These are the basic parts of speech. There are others that are suggested as distinct from these, and there are many sub-types within each part. A part of speech may be an individual word or more than one word (e.g. noun, noun phrase). A single word may function as different parts of speech in different sentences.

1. Noun - a word that represents a person, thing or concept. The -ing (gerund) form of a verb can function as a noun.
2. Pronoun - a short form word that substitutes for other nouns. These include the nominative forms I, we, you, he, she, it, and they. The subjective forms are me, us, you, him, her, it, and them. Possessive forms are my, mine, our, ours, your, yours, his, her, its, and their. Other pronouns include the interrogative (such as what), reflexive (such as myself), relative (such as that or which), demonstrative (these, those), and indefinite (such as all, any, anybody, or none).
3. Verb - a word that performs an action or connects nouns. The name of a verb is its infinitive (to form). Vebs may be transitive (affecting an object), intransitive, or linking.
4. Adjective - a word that modifies a noun (note that nouns preceding another noun (e.g. time clock) are not adjectives, but a special class called noun adjuncts.
5. Adverb - a word that modifies a verb, adjective, or another adverb.
6. Conjunction - a word that connects multiple nouns, multiple verbs, multiple phrases, or clauses in a sentence. Classically there are the words such as and, but, and or. But there are other conjunctions, divided into three classes: coordinating, correlative, and subordinating. Coordinating conjunctions include for, nor, yet, and so. Along with and, or, and but, they spell the mnemonic "fanboys." Correlative conjunctions include pairs of separated words (e.g. both/and, neither/nor). Subordinating conjunctions show time (after), cause-and-effect (because, since), opposition (though), or condition (if).
7. Preposition - a word that relates words, and allows them to modify other words. Some common prepositions are at, to, of, for, in, on. The three types of prepositions are time (after), place (in, at), and direction (under, left, to, toward). There are more than 100 prepositions, but some are no longer used in common English.
8. Article or Interjection - Various lists include either articles, interjections, or both, as parts of speech. Articles are the three words (a, an, the) that determine whether a noun is indefinite or definite. Interjections are words that have no actual relation to a sentence's meaning but represent expressions of feelings or emotions. Examples include, Hey!, Ah, Oh, Gee!, Wow!,Ouch, and Yippee! Other types of words can function as interjections when they are exclamations (indeed! All right!).

(see the related question for more on parts of speech)

(see the related links for more on specific parts of speech)
The parts of the speech are the classification of words according to their nature without taking into account the context in wich they appear, there are 8 parts of the speech:

1.- Apple:words usedd to refer a concept, to name an object, there are several types of nouns:

a) proper nouns: capitalized, to name a particular person, place or thing (Oscar, Mexico, etc.)

b) common nouns: they name anyone of a group of persons, places or things, not capitalized (dog, student, etc.)

c) compound nouns: nouns compound by two or more words used together as a single noun (newsstand, sister-in-law, etc.)

d) abstract nouns: things not perceived physically (love, time, etc.)

2.- Pronouns: ussually used in place of a noun or of more than one noun. these are the types of pronouns:

a) personal pronouns: I, you, we, he, she, it, they.

b) posessive pronouns: to refer property: my, mine, your, yours, etc.

c) demonstrative pronouns: to ponit out a specific person or thing: this, these, that, those.

c) reflexive pronouns: used to indicate that people do something by themselves: himself, serself, yourselves, etc.

d) interrogative pronouns: always at the begginning of a sentence (if not, they can became something else) what, which, who, etc.

e) relative pronouns: they introduce a subordinate adjective clause (a group of words that modify a noun) who, whom, whose, that, which.

f) indefinite pronouns: words that refer to people, places, etc. in general, are not particularized: all, another, anybody, anoyone, anything, both, each, either, enough, everybody, everyone, everything, few, many, more, most, much, neither, nobody, none, nothing, no one, one, plenty, several, some, somebody, someone, somthing.

3.- le apple: a state of being, word that expresses an action or otherwise helps to make a statement, there are tree types:

a) action verbs: such as do, come, go, and write, sometimes actions verbs express an action that cannot be seen: believe, remember, know, think, etc.

b) linking verbs: are the conect, and serve as a link between two words, the commons are: to be, become, feel, look, seem, smell, sound, tastem stay, turn, remain, grown and appear.

c) modal verbs: these verbs work together with the main verb as a unit: has, have, had, shall, will, can, may, should, would, could, might, must, do, did, does.

4.- le super apple: words that modify a noun or a pronoun (usually a noun) by answering one of these cuestions: What kind? (blue, new) Which one? (that, next) How many? (some, few, a lot). Sometimes the nouns are used as adjectives, these will be called proper adjectives: Picasso painting, November rain.

5.- Adverbs: these are words used to modify verbs, adjectives and other adverbs, the classical adverbs are:

a) Adverbs of manner: answer the cuestion How? (ferociously)

b) Adverbs of time: answer the cuestion when? (yesterday)

c) Adverbs of place: answer the cuestion where?

d) Adverbs of frequency: answer the cuestion How often?

e) Adverbs of degree: to what extent or degree?

6.- Prepositions: certain words in a sentence that relate nouns and pronouns to another noun or pronoun, to verbs, or to modifiers. A preposition is a word that chose the relationship of a noun or a pronoun to some other word in the sentence These are the prepositions: aboard, about, above, across, after, against, alone, among, around, at, before, behind,below, beneath, beside, besides, between, beyond, by, concerning, despite, down, during, except, for, from, in, inside, into, like, near, of, off, on, onto, out, outside, over, past, since, through, throughout, till, to, toward, under, underneath, until, up, upon, with, within, without.

Compound prepositions: two or more words working as a set: according to, as o, as well as, aside from, because of, by means of, on addition to, in front of, in place of, in spite of, instead of, in regard to, next to, on account of, out of, owing to, prior to, etc...

7.- Conjunctions: a word that connects individual words or groups of words (the act of joining= to conjunct) there are tree types of conjunctions:

a) coordinating conjunctions: they may join single words or groups of words that are the same grammar category (have the same function and perform the same actions in the sentence): and, but, or, nor, for, yet, so...

b) correlative conjunctions: they are two or more words that work together as a set and links words or clauses (items of the same kind): both...and, not only... but also, either... or, neither... nor, wheter... or.

c) subordinating conjunctions: are those that introduces subordinating clauses, which are the clauses that cannot stand by themselves (for instance subordinating noun clauses or subordinating adverb clauses), the most common are:

I) time: after, as, as long as, as soon as, before, since, until, till, when, whenever, while

II) manner: as, as if, as though

III) cause: because

IV) condition: although, as long as, even if, even though, if, provided that, though, unless, while

V) comparison: as, that

VI) porpose: in order that, that, so that

Conjunction Adverbs: type of adverbs that functions similarity to a coordinating conjunctions, ussually connect independent clauses (usually a semi-colon precedes the conjunctive adverb and a coma follows it) accordingly, also, besides, consequently, finally, furthermore, however, indeed, instead, later, moreover, nevertheless, otherqwise, still, therefore, thus.

8.- Le jus

The word 'it' is a personal pronoun, a word that takes the place of a noun. The pronoun 'it' is the third person, neuter form that can be either subjective or objective. Example:

Jim's car is new, it has whitewall tires and red upholstery.

The word 'what' is a pronoun, an adjective, an adverb, and an interjection.

The pronoun 'what' is an interrogative pronoun and a relative pronoun.

An interrogative pronoun introduces a question.

Example: What is your favorite movie?

A relative pronoun introduces a relative clause, a group of words that includes a subject and a verb giving information about the antecedent but an incomplete sentence on its own.

Example: He gets what he wants by saving his money.

An adjective is a word used to describe a noun.

Example: I've spent what money I had.

As an adverb, the word 'what' is used to express how much or how.

Example: What can go wrong?

As an interjection, the word 'what' is used to express surprise.

Example: What! The tickets are sold out?

Yes, the word 'wondering' is a gerund, the present participle of a verb that can function as a noun.

The present participle of the verb also functions as an adjective.

Examples:

Wondering can lead you to a great deal of knowledge. (noun)

The manager was wondering if you could change your shift. (verb)

He's a bright boy with a wondering mind. (adjective)

He is a quick learner, "quick" is an adjective describing the noun "learner", but in

His mean response cut me to the quick, "quick" is used as a noun.

In the sentence Quick! Quick! You'll miss the faceoff!the imperative command.

"Come quickly" is implied/understood, and thus the word "quick" would be used

as an adverb describing the verb "come".

With this one: "Peace is to be desired, rather than war."