Colons & Dashes: Mastering SAT & ACT Grammar

Let's explore the essential rules for using colons correctly.A colon serves three main purposes: introducing a list, providing an explanation, or offering an elaboration.The most important rule to remember is that a complete sentence must come before the colon.Let's analyze how a complete sentence is structured before a colon. We need a subject and verb to make it complete.Now that we understand the basic rules for colons, let's move on to our next topic.The em dash and en dash serve different purposes in writing.The em dash is longer and creates strong breaks in sentence structure.Em dashes can replace parentheses, create emphasis, or show interruption in speech.The en dash is shorter and primarily connects ranges of numbers, dates, or times.En dashes are perfect for showing spans and ranges in a concise way.Watch how we can transform this sentence using em dashes instead of parentheses.And here's how an en dash cleanly connects a range of years.Let's look at some advanced applications of both dashes.Em dashes can introduce lists with emphasis, while en dashes can connect compound terms.Now that we've mastered the types and uses of dashes, we're ready to tackle test questions about them.When tackling colon and dash questions on standardized tests, start with the complete sentence rule.Let's look at two examples. In the first, we have a proper complete sentence before the colon.But in this incorrect example, the word 'including' makes the first part incomplete.Now, let's examine common traps that test-makers use to trick students.Here's a helpful strategy: when you see a dash, try replacing it with commas or parentheses. If the sentence still makes sense, the dash is likely used correctly.Let's practice with a test-style question. Choose the correct punctuation for this sentence.Option A is correct because we have a complete sentence before the colon, which properly introduces the list that follows.