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.

My hunch for a grammar rule that could explain what makes a sentence grammatically correct or not is that verbs must agree with their subjects in number and tense. Additionally, adjectives and adverbs must agree with the nouns and verbs they modify in number, tense, and degree. Finally, word order is important, with the subject typically coming before the verb in English sentences.

Upon reviewing the sentences I have worked with, this hunch seems to hold true. For example, in the sentence "The cat eats," the subject "cat" is singular, so the verb "eats" agrees with it in number. In contrast, the incorrect sentence "The cat eat" does not follow this rule.

The explanation of this principle is that verbs must agree with their subjects in number and tense, while adjectives and adverbs must agree with the nouns and verbs they modify in number, tense, and degree. Word order is also important, with the subject typically preceding the verb.