the subjuect of a sentence may be what parts of speech?

The subject of a sentence may be a noun or a pronoun.

Check these sites for information about sentence structure and parts of speech.

http://www.towson.edu/ows/sentencestruct.htm

http://www.arts.uottawa.ca/writcent/hypergrammar/sntstrct.html

http://www.arts.uottawa.ca/writcent/hypergrammar/partsp.html

Ms. Sue is correct and she's given you some excellent websites.

Remember that almost all subjects are either nouns or pronouns, but once in a great while a gerund phrase or an infinitive phrase or a relative clause can serve as a subject. Those are rare, but they do happen.

http://grammar.ccc.commnet.edu/grammar/phrases.htm#gerund
Notice the 1st example.

http://grammar.ccc.commnet.edu/grammar/phrases.htm#infinitive
Notice the 3rd and 4th examples.

http://grammar.ccc.commnet.edu/grammar/clauses.htm#noun
Scroll down until you see the section on NOUN CLAUSES -- there are examples there.

The subject of a sentence can be one or more parts of speech. Typically, the subject of a sentence is a noun or a pronoun. However, it can also be a noun phrase, which includes modifiers such as adjectives or articles. Additionally, a subject can sometimes be a gerund (a verb form ending in -ing that functions as a noun) or an infinitive (the base form of a verb preceded by "to").

To identify the subject of a sentence, you can follow these steps:

1. Find the verb: Look for the main action or state of being in the sentence. The subject is usually associated with this verb.
2. Ask "Who" or "What" before the verb: Pose a question using these words, and the answer will likely be the subject.
3. Check for agreement: Ensure that the subject and the verb agree in number (singular or plural).

Let's take an example sentence and identify its subject together:

Example sentence: "The dog ran quickly."

1. Find the verb: The main verb in this sentence is "ran."
2. Ask "Who" or "What" before the verb: Who or what ran? The answer is "The dog."
3. Check for agreement: The subject "The dog" is singular, and the verb "ran" agrees with it.

In this case, the subject of the sentence is a noun (dog) modified by an article (the).