A sentence is one complete statement about a topic, or subject.
The most important parts of a sentence are the subject and the verb. A verb is an action word; it explains what is happening in a sentence. E.g. write, swim, argue. To find the verb in a sentence, we can ask questions such as: what is the subject doing?
A subject is often a concrete or abstract concept such as book (concrete) or idea (abstract). Such words are called ‘nouns’. However, a subject could be a word like it or they, which replaces a noun from a previous sentence (a ‘pronoun’). To find the subject in a sentence, we can ask questions such as: who is doing the action?
Sentences may have many other components, but the first step to ensure you have written a correct sentence in English is to check if it has a subject and a verb.
Look at the following sentence and how it is divided into parts:
Students enjoy group work.
Doer of action
(who enjoys group work?)
(what do students do?)
Receiver of action
The image below illustrates standard word order in an English sentence (often abbreviated as SVO):
Facebook is being used to exchange information and pictures in everyday life.
 Conversations with friends and family.  Stay in touch with business colleagues. However, from an educational perspective, the social media website can be seen as a distraction. This essay…
We can see that there is no verb in this sentence. There is also no subject.
It allows conversations with friends and family.
This example needs a subject, or connecting to a sentence which shares the same subject.
Users can stay in touch with business colleagues.
Facebook is being used to exchange information and pictures in everyday life, and to stay in touch with business colleagues.
Click the link below to download a PDF version of the Sentence Structure checklist.