An essential relative clause provides necessary, defining information about the noun. On the other hand, non‐ essential relative clauses provide additional, non‐necessary information about the noun.

Non-defining relative clauses are a speaker's friend. Dan teaches us five ways to use them in this bite-sized video. 0 / 5 Dan, who is an excellent teacher of English, has a handful of tips to help ...

The man who lives next door is very friendly. In the above sentence, the relative clause who lives next door modifies the noun ‘man’. It gives more information about the subject and is essential to ...

Relative clauses are bound clauses that modify NPs and occasionally CPs. The former are adjoined to NPs. A relative clause contains a WH-phrase which moves and is adjoined to CP: The student who likes ...

BBC Lingohack "英语大破解"：One of UK's most scenic railway lines turns 150 years old 英国最美铁路线之一迎来 150 岁生日 ...

Relative clauses are used to give additional information about a noun, such as a person, place or thing. Relative pronouns introduce a relative clause. They include who for people, that and which for ...