The Grammaring Guide to English Grammar with Exercises

Revision questions: relative clauses

What is the difference between defining and non-defining relative clauses?

What is a sentential relative clause?

Do we use a comma before the relative pronoun that?

Which one is the most formal: whom, who or that?

When can we not use that instead of which in a relative clause?

When do we use a past participle (the third form of the verb) in a non-finite relative clause?

When do we use a present participle (the -ing form of the verb) in a non-finite relative clause

What does what stand for in I don't understand what you mean?

Do we use a comma in a cleft sentence?