Restrictive and non-restrictive clauses are vital in understanding grammatical structures. Restrictive clauses narrow down the meaning of nouns, while non-restrictive clauses add extra information.
Restrictive clause: Restrictive clauses are essential to the meaning of a sentence as they provide necessary information that defines the noun. They are not set off by commas and help narrow down the noun's meaning.
Example: All politicians who are crooks should be jailed (restrictive clause).
Non-restrictive clause: Non-restrictive clauses are not essential to the sentence's meaning but provide extra information. They are set off by commas.
Example: All politicians, who are crooks, should be...
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