Sentence (linguistics)

A sentence is a group of words. It shares a thought with you.

Sentences can do many things. They can ask a question. They can give a command. They can also make a statement.

Sometimes a sentence is very long. Other times it is very short. Some sentences use only one word.

We use marks to show a sentence is done. We use a period or a question mark. This helps us read clearly.

Sentences help us share our ideas. They make our talking and writing work.

A sentence is a group of words. It shares a thought with you.

Sentences can do many things. They can ask a question. They can give a command. They can also make a statement. Some sentences even show surprise. We call these exclamations.

In writing, we use marks to show a sentence is done. We use a period, a question mark, or an exclamation mark. These marks help us read clearly.

Some sentences are big. They use many parts called clauses. A simple sentence has one main part. A complex sentence adds more parts.

Other sentences are small. We call these minor sentences. They might not have a main verb. A person might just say, "Wow!" or "Hello!" These are still sentences.

Sentence length can change how hard a text is to read. Long sentences can be complex. Short sentences are often easier to understand. In news writing, sentences are often more than 15 words long. Knowing how to use sentences helps us share our ideas well.

A sentence is a special way we group words together. It helps us share a complete thought with others. In grammar, a sentence often has a subject and a predicate. The subject is the person or thing we are talking about. The predicate tells us what that subject is doing. Some people define a sentence by how it looks on paper. They look for capital letters at the start. They also look for marks like periods or question marks at the end.

Sentences work using smaller building blocks called clauses. A single clause is often called a clause simplex. It shows one process happening over time. You can join these together to make a clause complex. This shows a logical link between two or more processes. Some clauses are independent and can stand all by themselves. They can make a statement or ask a question. Other clauses are non-independent or interdependent. These need to be joined to an independent clause to make sense.

We can group sentences by how they are built. A simple sentence uses only one independent clause. A compound sentence uses two or more independent clauses. These are joined by words called conjunctions or by punctuation. A complex sentence has one independent clause and at least one dependent clause. There are even compound-complex sentences. These have multiple independent clauses and at least one dependent clause. This allows writers to build very detailed ideas.

Sentences also have different jobs to do. We call these jobs speech acts. A declarative sentence simply makes a statement. An interrogative sentence asks a question. An imperative sentence gives a command to someone. An exclamative sentence shows strong feeling or surprise. Sometimes the form and the meaning do not match. For example, a question might actually be a command. A rhetorical question might actually be an exclamation.

Not all sentences follow the same rules. Most are major sentences with a subject and a predicate. However, minor sentences are different and irregular. They might not have a main clause at all. You might see them as headings or simple words like "Wow!". Some sentences are just one single word. The length of a sentence also matters a lot. In news writing, the middle sentence length is often above 15 words. Longer sentences can sometimes be more complex to read.

In the study of linguistics, a sentence is a fundamental unit of communication. It serves as a linguistic expression used to convey complete thoughts. Traditional grammar often defines a sentence as a string of words containing a subject and a predicate. A subject is typically a noun phrase, though other phrases like gerund phrases can function this way. The predicate provides the action or state of being. In functional linguistics, a sentence is defined by its visual markers in written text. These include upper-case letters at the start and punctuation marks like periods, question marks, or exclamation marks at the end.

Sentences are built from smaller components known as clauses. A clause is a sequence of words representing a process occurring through time. Linguists distinguish between a clause simplex and a clause complex. A clause simplex represents a single process. In contrast, a clause complex represents a logical relationship between two or more processes. This complex is composed of two or more simplexes. Within these structures, we find independent and non-independent clauses. An independent clause can realize a speech act on its own. A non-independent clause, also called an interdependent clause, cannot stand alone. It must be logically related to an independent clause to complete a thought.

We can classify sentences based on their structural complexity. A simple sentence contains only one independent clause. A compound sentence uses multiple independent clauses joined by conjunctions or punctuation. A complex sentence consists of one independent clause and at least one dependent clause. There is also the compound-complex sentence. This type includes multiple independent clauses and at least one dependent clause. This hierarchy allows speakers to express increasingly intricate logical connections. By varying these structures, a writer can control the flow and depth of information.

Sentences also perform specific social functions called speech acts. These functions are categorized into four main types in English. A declarative sentence makes an assertion or statement. An interrogative sentence raises a question. An imperative sentence issues a command. An exclamative sentence expresses strong emotion or an exclamation. Interestingly, the form of a sentence does not always match its intended meaning. A question like "Can you pass the salt?" may actually function as a command. Similarly, a rhetorical question might be used to make an exclamation rather than to seek information.

Most sentences are classified as major sentences. These follow regular patterns by including both a subject and a predicate. However, minor sentences are irregular and do not contain a main clause. You might encounter minor sentences as headings, proverbs, or emotional outbursts like "Wow!". Some minor sentences are even nominal, meaning they omit a main verb for conciseness. There are also word sentences, where a single word functions as the entire sentence. These variations allow for brevity and intensity in different contexts.

The length of a sentence is a key metric in linguistic research. One way to measure average sentence length is the ratio of words to sentences in a prose passage. In journalistic prose, the median sentence length is often above 15 words. Sentence length is frequently used as a measure of complexity. As the average length increases, the perceived difficulty of the text generally rises. Other researchers define length by the number of clauses or the number of phones in a clause. Understanding these measurements helps linguists study how information is processed by readers.

Research has also explored how sentence length behaves in different types of writing. Studies by Erik Schils and Pieter de Haan examined five different texts. They found that two adjacent sentences are more likely to have similar lengths than non-adjacent ones. This pattern is almost certainly present in works of fiction. This finding challenged the older theory that authors always aim to alternate between long and short sentences. While length affects readability, other factors like the use of conjunctions can also help facilitate comprehension. These elements work together to create the complex systems of human language.