Grammar and usage. (2011). Irvine: Saddleback Educational Publishing, 6. Retrieved from http://search.ebscohost.com/login.aspx?direct=true&db=e700xww&AN=435827&site=ehost-live&ebv=EB&ppid=pp_6
This resource can be found here. It is part of our online nonfiction collection of items that you have free access to with a library card. All you have to do is scroll down to the bottom of this page, and log in.
The image gives the perfect summary for what a sentence is: a full thought that contains the 'who' and 'what they did'. So as long as you have both of those elements and it is a complete thought, then you have a sentence. It will also always start with a capital letter (ABC) and have punctuation like a full stop (.) at the end. And the resource allows you to practice this on following pages; so feel free to use them if you are trying to show or explain to someone how to write a sentence.
But, stop! What if I have a question? Or, you need to understand how I feel! Or, I need to tell you to do something. ... Well, a sentence does not have to end in a full stop (.). Ending a sentence with a question mark (?) or an exclamation mark (!) still shows a complete thought; as long as the 'who' and the 'what they did' or 'how they felt' is in there.
What sound does a dog make?
I wanted the last piece of chocolate!
He jumped on the trampoline.
Go over there now!
The fireworks are pretty.
Now I know that these sentences seem small; especially since the sentences I am writing are very long. Books like 'Grammar and usage' go into more detail; but ease you in to learning things that seem much more complicated than they first appear. And we have a lot of books you can use to help you!
But 'Grammar time' will also break things down ... and over time there will be a lot more about sentences coming. So, watch out! It's time to break grammar down.