Understanding complex sentences

Think of a complex sentence like a main train with one or more smaller carriages attached to it. The main train (which we call the independent clause) can travel all by itself and still make sense, like saying, "I love pizza." It has a subject (who or what the sentence is about, like 'I') and a verb (the action, like 'love').

The smaller carriages (which we call dependent clauses) can't travel alone. If you just say, "Because it's delicious," it leaves you hanging, right? It needs the main train to make full sense. When you link these two together, you get a complex sentence: "I love pizza because it's delicious."

• Independent Clause: A complete thought that can stand alone as a sentence. It's the main idea.
• Dependent Clause: An incomplete thought that cannot stand alone. It adds extra information to the main idea.
• Subordinating Conjunction: The special 'glue' word (like 'because', 'although', 'while') that connects the dependent clause to the independent clause.

Let's imagine you're planning a trip to the park with your friend. You could say: "I will bring the frisbee. You should bring the snacks." These are two simple sentences.

But if you want to connect these ideas smoothly, you might say: "Although I will bring the frisbee, you should bring the snacks." See? The first part, "Although I will bring the frisbee," can't stand alone. It makes you wonder, "Although you'll bring the frisbee, then what?" It's the dependent clause.

The second part, "you should bring the snacks," makes perfect sense on its own. That's your independent clause. The word "although" is the special connecting word (subordinating conjunction) that links them up, creating one awesome, flowing complex sentence!

1. Start with your main idea. This will be your independent clause, the part that can stand alone as a complete sentence. For example: "The dog barked loudly."
2. Think of extra details or reasons. What more do you want to add about the main idea? For example: "It heard the mailman."
3. Choose a connecting word (subordinating conjunction). Pick a word like 'because', 'when', 'after', 'since', 'although', 'while', 'if', 'unless', 'where', 'who', 'which', 'that'. This word will show the relationship between your ideas. For example, 'because'.
4. Attach the extra detail using the connecting word. This creates your dependent clause. For example: "because it heard the mailman."
5. Combine them into one complex sentence. If the dependent clause comes first, use a comma. If the independent clause comes first, often no comma is needed. So: "The dog barked loudly because it heard the mailman." Or: "Because it heard the mailman, the dog barked loudly."

Just like there are different types of carriages on a train (passenger, cargo, dining car), there are different types of dependent clauses, each adding a specific kind of information:

• Adverbial Clauses: These act like adverbs (words that describe verbs, adjectives, or other adverbs). They tell you when, where, why, how, under what condition, or to what extent something happened.
  • Example: "I'll play outside when the rain stops." ('when' tells you the time)
• Adjectival Clauses (also called Relative Clauses): These act like adjectives (words that describe nouns). They describe a noun or pronoun in the main clause, usually starting with words like 'who', 'whom', 'whose', 'which', 'that', 'where', 'when', 'why'.
  • Example: "The girl who won the race is my sister." ('who won the race' describes 'the girl')
• Noun Clauses: These act like nouns. They can be the subject of a sentence, the object of a verb, or the object of a preposition. They often start with 'that', 'what', 'whatever', 'who', 'whoever', 'whom', 'whomever', 'whose', 'which', 'whichever', 'when', 'where', 'why', 'how', 'if', 'whether'.
  • Example: "I know that you studied hard." ('that you studied hard' is the object of the verb 'know')

• Mistake 1: Forgetting the comma when the dependent clause comes first.
  • ❌ "Because it was raining I brought an umbrella."
  • ✅ "Because it was raining, I brought an umbrella." (Think of the comma as a little pause before the main idea starts.)
• Mistake 2: Using only simple sentences when you could combine ideas. This makes your writing sound choppy and less mature.
  • ❌ "I went to the store. I bought milk. It was for breakfast."
  • ✅ "I went to the store because I needed milk for breakfast." (Smoother, more sophisticated!)
• Mistake 3: Creating a 'sentence fragment' (an incomplete sentence) by letting a dependent clause stand alone. Remember, dependent clauses can't travel alone!
  • ❌ "Although I finished my homework. I still felt tired." (The first part isn't a full sentence on its own.)
  • ✅ "Although I finished my homework, I still felt tired." (Connected correctly to the independent clause.)