To practice correct sentence grammar, it is necessary to learn, understand and apply the basic rules of sentence structure in English. These rules involve understanding subject and predicate, knowing the parts of speech and how they function, understanding punctuation and understanding how sentences are put together via word order.
Every English sentence consists of a subject and a predicate and must express a complete thought. By extension, every sentence in English must have at least one subject (a noun) and one verb. The first word of a sentence should be capitalized, and the sentence should end with a period. The most common word order in English is "subject-verb-object", as in "The cow (subject) jumped (verb) over the moon (object)."
The basic parts of speech include nouns, pronouns, verbs, adjectives, adverbs, conjunctions and prepositions. Nouns are people, places, things or ideas that often become the subject of a sentence. Pronouns are a categorical substitution for a noun or proper noun (name), such as saying "he" instead of "Gerard the male horse." Verbs are words showing action, movement or change. Adjectives are words that give more information about nouns, and adverbs do the same for verbs. Prepositions show location, and conjunctions tie two independent clauses together with words such as "but," "and," "yet," "for," or "so."