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. now check your hunch with the explanation of this principle in the following pattern.

The rule that I think could be used to write sentences in Spanish is:

- A sentence written correctly in Spanish requires that the person notice that he has the basic form: noun, verb and complement, that in the section of the sentence where the person who executes the action is found: the article and the adjective, are found in singular or plural, masculine or feminine, it is in concordance with the noun, the verb belongs to the appropriate tense and the complement, if it is of time, is related to the conjugate verb.

Explanation:

Spanish has many grammar rules applicable to each of the tenses and its variations such as the Subjunctive and the Indicative, so making a single rule that includes all is unlikely, so in the response rule, I have added essential and important guidelines that can help a person whose mother tongue is not Spanish to understand it fairly.

answer: the answer is b. se quejan because it's in the plural form.