It's one thing to learn how to identify relative clauses; it's another thing to learn how to form them.  Even if your students know what relative clauses are, they might be at a loss when they need to use them.

This video goes through 4 steps of taking two clauses and putting them into a complex sentence (in which one of the clauses is a non-defining relative clause).  Laying out the process into distinct steps can help students understand and remember what to do.

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