Now that you have worked through a lot of material that includes these basic patterns, and you have compared grammatically correct and incorrect sentences, write down what you think is a rule that could explain what makes a sentence grammatically correct or not. For example, you might write something like: "verbs always match nouns in number, and they usually come before the noun." In other words, make your best guess for the grammar rule that makes sense out of the pattern(s) you see in the phrases you have been working with. Review if you need to, and you might briefly check your hunches against the sentences you have been working with in this or previous modules. Keep in mind that what you're after is your hunch, not a grammar rule from a text book. Then check your hunch with the explanation of this principle in the following pattern.

One possible rule that could explain what makes a sentence grammatically correct is "subject-verb agreement." This rule states that the verb in a sentence must agree in number (singular or plural) with the subject of the sentence. For example, in the sentence "The cat is sleeping," the singular subject "cat" is paired with the singular verb "is," while in the sentence "The cats are sleeping," the plural subject "cats" is paired with the plural verb "are." This rule helps ensure that the sentence is clear and coherent.