Introduction: Leveling Up Your Language

Welcome! In this chapter of Grammar in Use, we are going to explore how to move beyond simple, "choppy" sentences. To achieve high marks in the IB Language B course—especially in Criterion A (Language)—you need to demonstrate a variety of grammatical structures. Relative clauses and complex sentences are your best tools for this. They allow you to pack more information into your writing and speaking, making your communication clearer and more sophisticated.

Think of simple sentences like individual bricks. They are strong, but on their own, they don't make a building. Complex sentences are the mortar and architecture that connect those bricks into a beautiful house. Whether you are writing a brochure about the environment or giving an individual oral about a literary work (for HL), these structures will help you shine.

1. Relative Clauses: Adding Detail with Ease

A relative clause is a part of a sentence that gives us more information about a person, place, or thing without starting a new sentence. It usually starts with a relative pronoun (like who, which, or that).

The Tools: Relative Pronouns

  • Who: Used for people. (The student who won the award is in my class.)
  • Which: Used for things and animals. (The technology which was invented last year has changed lives.)
  • That: Used for people or things (mostly in informal or "defining" contexts).
  • Whose: Used to show possession. (The artist whose painting we saw is very famous.)
  • Where/When: Used for places and times. (The city where I was born is very green.)

Defining vs. Non-Defining Clauses

Don't worry if these terms sound technical! The difference is actually quite simple:

1. Defining Clauses: This information is essential. Without it, we don't know who or what we are talking about. We do not use commas here.
Example: "The book that I read for my HL English course was fascinating." (Which book? The one I read!)

2. Non-Defining Clauses: This is extra information. If we take it out, the sentence still makes sense. We must use commas.
Example: "Global warming, which is a major theme in the 'Sharing the Planet' topic, affects everyone." (We already know the subject is global warming; the clause just adds detail.)

Key Takeaway:

Use relative clauses to combine two short sentences into one sophisticated one. Instead of saying "I have a friend. He lives in Paris," try "I have a friend who lives in Paris."

2. Building Complex Sentences

A complex sentence is made by joining an independent clause (a complete thought) with a dependent clause (a thought that can't stand alone).

The Secret Ingredient: Subordinating Conjunctions

To connect these clauses, we use special words. These words help show the relationship between ideas, such as cause and effect, contrast, or time.

  • Contrast: Although, even though, while, whereas.
    Example: "Although technology connects us, it can also lead to social isolation."
  • Cause/Reason: Because, since, as.
    Example: "The community organized a protest because the local park was being closed."
  • Condition: If, unless, provided that.
    Example: "We will protect the environment unless we continue to waste resources."
  • Time: When, before, after, as soon as.
    Example: "After the students finished their exams, they celebrated their hard work."

Note: For more on connecting words, see the chapter on "Connectives and cohesion."

Common Mistake: The "Double Subject"

One common error is repeating the subject in a relative clause.
Incorrect: "The girl who she lives next door is nice."
Correct: "The girl who lives next door is nice." (The word "who" replaces "she.")

3. Why This Matters for Your IB Grade

Whether you are at SL or HL, the examiners are looking for your ability to use complex language. Here is how these structures help you in the different exam components:

Paper 1: Writing

In your 250–400 word (SL) or 450–600 word (HL) task, using complex sentences shows that you can develop ideas logically. It helps you meet Criterion B (Message) because you can explain why things happen (using "because") or under what conditions (using "if").

Paper 2: Receptive Skills

When reading or listening to texts about themes like Human Ingenuity or Social Organization, the authors will use relative clauses to describe complex systems. Recognizing these structures helps you identify the correct details for your answers.

Individual Oral (Internal Assessment)

Using "which," "who," and "although" while speaking makes you sound more fluent and natural. Instead of listing facts, you are weaving a story or an argument together.

Quick Review: Check Your Knowledge

Quick Review Box:
1. Use who for people and which for things.
2. Use commas if the information in a relative clause is just "extra detail."
3. Start sentences with words like Although or While to show you can handle complex structures.
4. Avoid repeating the subject inside a relative clause.

Did you know?
In English, we often drop the word "that" in defining relative clauses if it is the object of the sentence. For example: "The book (that) I bought" is perfectly correct with or without the "that"! However, in formal IB writing, keeping it in can sometimes help make your meaning clearer.

Remember: Don't worry if this seems tricky at first! Try to include just one or two relative clauses in your next practice essay, and soon they will become a natural part of your vocabulary.