Colon
According to Dictionary.com, a colon is defined as "the sign (:) used to mark a major division in a sentence, to indicate that what follows is an elaboration, summation, implication, etc., of what precedes; or to separate groups of numbers referring to different things, as hours from minutes in 5:30; or the members of a ratio or proportion, as in 1 : 2 = 3 : 6" (Dictionary.com definition 1).
Now I understand that this definition can be confusing, so I will break it down for you. A colon is simply used to have a divider in you sentence. It can be used if you are going to elaborate something, make a list or to sum something up. Below I have listed a few examples and a link to more examples if you need more examples.
Examples:
1.) You need to make a sentence listing what you need to go English class today (don't forget the colon)
Today I need to bring these things to English class: binder, paper, pencil, book, and a pen.
2.) You need to make a sentence to elaborate on this sentence: My dad is in the Navy.
My dad is in the Navy: he has worked very hard to get to where he is.
Now I understand that this definition can be confusing, so I will break it down for you. A colon is simply used to have a divider in you sentence. It can be used if you are going to elaborate something, make a list or to sum something up. Below I have listed a few examples and a link to more examples if you need more examples.
Examples:
1.) You need to make a sentence listing what you need to go English class today (don't forget the colon)
Today I need to bring these things to English class: binder, paper, pencil, book, and a pen.
2.) You need to make a sentence to elaborate on this sentence: My dad is in the Navy.
My dad is in the Navy: he has worked very hard to get to where he is.