You - subject pronoun
have to watch - have to + verb (shows obligation).
your - possessive
son - noun (object)
practice - verb
Baseball - noun
There are no sentences that have no parts of speech. Every word in a sentence is classified as a part of speech, such as nouns, verbs, adjectives, etc.
the subject of a sentence may be what parts of speech' call?
The individual word "sentence" is a common noun. However, a sentence itself is comprised of many different parts of speech.
Parts of speech
In this sentence, "past" is functioning as a noun. It refers to a period of time that has already occurred.
Words are classified as parts of speech based on their function as a word. If they are classified based on their role in the sentence, they are parts of a sentence. (there is not much difference between the two, but there is a difference)
A grammatically correct sentence in English requires only two parts of speech, a subject and a verb. There are however eight parts of speech that can be used in infinite combinations to form sentences.
Pronoun and speech
True
Close is an adjective.
Verb
The animals were thrilled