Look in a dictionary, most of the time they give not only an explanation of the word but also an example phrase in which the word is explained and used correctly. That's the best shot at finding the absolute right way to use it.
The words may and you can be used in a sentence. For example, "You may go to the fair tonight."
Words like "the," "a," and "that" are often indicators that a noun may be coming up in the sentence. Additionally, adjectives, possessive pronouns, and numbers are also common indicators that a noun may be present.
A sentence wouldn't be an adverb. A sentence is a group of words that contains a subject and a verb and forms a complete thought. It may or may not contain an adverb (a word that modifies a verb, an adjective, or another adverb).
A sentence fragment means a sentence that is a grammatical unit of one or more words, bearing minimal syntactic relation to the words that precede or follow it. In other words, it is a group of words that may look like a sentence, but it isn't because it doesn't have the necessary grammatical structure to qualify as one.
Time flies like an arrow. Fruit flies like a banana. Parallel structure is when the sentence is basically the same with different words. The structure of the sentence is the same in both cases. The words of the sentence may be different in both cases.
Nouns are people, place, and thing words. The nouns in your sentence are "brains" and "watermelons."
You can make a sentence with any number of words. Typically, a sentence has subject and predicate; ie subject & verb & object. "Cats kill birds" (Three word sentence) But some verbs are intransitive (i.e take no object): "Philosophers think". (Two word sentence) Some questions may be orders, with or without implied words; "Attention!" = "You, stand to attention!". "Go!" = "You, go!". (Two word sentence) Some questions may be questions, with or without implied words: "Why?" referring to words from a previously uttered sentence. *None of those sentences have eighteen words, but that total number is actually not a very high one.
Mother's day in in May. El Día de las Madres es en el mes de...mayo.
A sentence must contain a subject and a verb to be considered grammatically correct. If a group of words lacks this structure, it is not a complete sentence. It may be a sentence fragment, a phrase, or a list.
He may be inarticulate, but he doesn't need words to say that he is in love.
Consequently
A sentence is a group of words put together in proper order to express a complete thought.A sentence may consist of a single word ("Hide!") or of dozens of words, which are arranged in phrases and clauses that either add to the meaning or provide specific details.