This lesson introduces Defining and Non-Defining Relative Clauses as a core clauses structure for B1 learners.
When to use it
Use Defining and Non-Defining Relative Clauses when you need a reliable grammar pattern for common routines, facts, descriptions or classroom communication.
- Use Defining and Non-Defining Relative Clauses to build clear sentences in everyday communication.
- Start with short affirmative examples, then move to negatives and questions.
- Watch how meaning changes when the verb form or word order changes.
Form guide
Break the pattern into affirmative, negative and question forms. Practise one form first, then contrast it with another form so the rule becomes easier to remember.
Affirmative
Defining and Non-Defining Relative Clauses in a simple positive sentence.
Negative
Defining and Non-Defining Relative Clauses with the correct negative support form.
Question
Defining and Non-Defining Relative Clauses with the correct question word order.
Common mistakes
These are the patterns learners should check before they move into timed practice.
- Learners often mix Defining and Non-Defining Relative Clauses with a nearby grammar pattern from Clauses.
- Short forms and auxiliary choices are common sources of mistakes.
- Accuracy improves faster when you compare one correct model with one wrong model.