One of the most important aspects of effective writing is using different types of sentences. Sentence variety keeps readers engaged and helps you communicate your ideas precisely.
In English writing, eight types of sentences are possible. There are four types of sentences by structure (simple, compound, complex, and compound-complex) and four types of sentences by function (declarative, interrogative, imperative, and exclamatory).
Whether you’re working on essays, cover letters, or personal correspondence, the tips and examples below will help you use all eight of these sentence types effectively and correctly. No matter what types of sentences you’re using, QuillBot’s free Grammar Checker can help you avoid errors.
NoteEach sentence has one of the four possible structures and one of the four possible functions. For example, a simple sentence can be declarative, interrogative, imperative, or exclamatory. An imperative sentence can be simple, compound, complex, and compound-complex.
The word between is a preposition that can indicate locations (i.e., as a preposition of place), times, and amounts, as well as relationships or involvement.
Between examples in a sentenceThere’s a drugstore between the café and the burger place.
They’re building a high-speed rail link between the two cities.
We’re closed between 12 and 1 p.m.
There’s a flat rate for shipments that weigh between 20 and 50 pounds.
The goal is to build new partnerships between the university and local businesses.
TipQuillBot’s free Grammar Checker will help you to use “between” correctly in your writing and distinguish it from in between.
Contractions are words in English grammar that are usually shortened versions of two-word pairs (e.g., “could’ve” for “could have”). Each contraction has an apostrophe (‘) to indicate where one or more letters have been omitted (e.g., “h” and “a” in “could’ve”).
Contractions in writing save space and create an informal, conversational tone. For some academic writing assignments (e.g., essays and dissertations), they’re too informal (depending on the guidelines you’re following). In workplace writing, they’re usually perfectly acceptable.
Contractions examplesAndrew couldn’t find his blue rain jacket anywhere. (could not)
Sarah’s working a night shift, and Devin’s staying home. (Sarah is and Devin is)
The musician who’s headlining the festival won a Grammy. (who is)
I wish we would’ve visited the aquarium when we were in Monterey. (would have)
TipMistakes like missing apostrophes are common with contractions, but QuillBot’s free Grammar Checker can help you get them right. It will instantly show you which contractions are incorrect and how you can fix them.
The genitive case in English is a grammatical form for nouns, determiners, and pronouns that have a possessive relationship with another noun. For example, the genitive case of “Ava” is “Ava’s” in the phrase “Ava’s car,” which shows that Ava owns the car. The possession can be literal or metaphorical (e.g., “our friend” or “the apartment’s balcony”).
English nouns in the genitive case have apostrophes (e.g., “Molly’s guitar”). Genitive case also includes possessive determiners (e.g., “her guitar”) and possessive pronouns (e.g., “The guitar is hers”).
Genitive case examples
Possessive nouns
Possessive determiners
Possessive pronouns
The mayor’sEarth Day speech inspired us to plant a garden.
The apartment above the bookstore used to be ours.
Diana’s backyard has a 300-year-old tree.
The iced mocha latte boosted her energy.
Aaliya just left, so this jacket must be hers.
All of my friends’ dogs are sweet and lovable.
Jude and Tracey are super busy because their kids all play sports.
The artists said that those designs are theirs.
You can also use a noun phrase with “of” to show a possessive (or similar) relationship. For example, in “The balcony of the apartment was full of plants,” the balcony “belongs to” (or is part of) the apartment.
The following tips and examples show when the genitive case is necessary and how to use the different versions of the genitive case correctly.
NoteThe other two cases in English are nominative case (e.g., “I” and “they”) and objective case (e.g., “me” and “them”). All three cases affect the spelling of pronouns. However, only genitive case affects nouns.
In some languages, the accusative case is a grammatical case for the direct object of a verb. For example, in “I made two pizzas and baked them in the oven,” the pronoun “them” is the direct object of the verb “baked.” In English, the grammatical case for direct objects (as well as indirect objects and objects of prepositions) is called the objective case.
The term “accusative case” isn’t common in English because its three grammatical cases are nominative, genitive, and objective. In other languages (e.g., German and Russian), the accusative case is for direct objects, and the dative case is for indirect objects. In English, direct objects and indirect objects are both part of the objective case.
Learning about the objective case helps with correct pronoun usage. When a pronoun is a direct object, it must be an objective case pronoun (e.g., “her” or “me”). Nominative case pronouns (e.g., “she” or “I”) are not correct for direct objects.
Accusative case examplesJason invited us to Hawaii.
The dative case is the grammatical case for an indirect object—a noun or pronoun that receives a direct object. For example, in “Sally baked us a cake,” the indirect object “us” receives the direct object “cake.”
The term “dative case” isn’t a common grammar term in English because the three cases in English are nominative, genitive, and objective. The objective case in English includes the accusative caseanddative case, which are different in some languages (e.g., Latin and German), but not English.
Learning about the objective case helps you use pronouns correctly. When a pronoun is an indirect object (dative case), a direct object (accusative case), or the object of a preposition, it must be one of the objective case pronouns (e.g., “them” or “themselves”). Nominative case pronouns (e.g., “they”) are not correct in the objective case.
Dative case examplesPedro wrote Summer a note.
The realtor showed us three houses.
The bank loaned themmoney for a car.
Kamal’s parents threw him a huge party on his birthday.
The word above typically functions as a preposition or an adverb indicating a position or location that is “higher” than something else—physically, numerically, hierarchically, or figuratively.
Above examples in a sentenceI think the canned tomatoes are at the bottom, below the rice and flour.
She looked up at the grey clouds above.
You’re only allowed in if you’re 21 or above.
The position above mine has become vacant, so I’m going to apply for it.
Please see above for more details.
This is because he demands loyalty above all else.
