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This grammar resource teaches the difference between defining and non-defining relative clauses and the correct use of commas. Includes a two-page explanation, examples with “who,” “which,” and “that,” 12 sentence-completion tasks, 12 gap-fill tasks, a comprehension question, and a terminology task with full solutions. Perfect for ESL/EFL learners and secondary school students (grades 6–8) working on punctuation and complex sentence structure.

Tags: commas, relative clauses, defining clauses, non-defining clauses, English punctuation, grammar rules, relative pronouns, sentence structure, English grammar, comma placement, grammar exercises, punctuation for students, EFL, ESL writing, English teaching, secondary English, punctuation worksheets, English classroom, grammar for schools, punctuation clarity, who which that, relative pronouns in English