With two or more singular antecedents connected by or or nor, the pronoun is singular.

VII. A verb agrees with its subject in person and number.

With two or more subjects connected by and, the verb is plural.

With two or more singular subjects connected by or or nor, the verb is singular.

VIII. A participle assumes the action or being, and is used like an adjective or a noun.

IX. An infinitive is generally introduced by to, and with it forms a phrase used as a noun, an adjective, or an adverb.

X. Adjectives modify nouns or pronouns.

XI. Adverbs modify verbs, adjectives, or adverbs.

XII. A preposition introduces a phrase modifier, and shows the relation, in sense, of its principal word to the word modified.

XIII. Conjunctions connect words, phrases, or clauses.