AtC serve as an attribute to a noun (pronoun) in the PC. The noun is called the antecedent of the clause. Attributive relative clauses qualify the antecedent, and attributive appositive clauses disclose its meaning. AR restrictive C restricts the meaning of the A, so it can't be removed without destroying the meaning of the sentence, not separated by a comma (All that I want from you…).
Introduced by: 1) The relative pronouns "who, whose, which, that, as"; 2) The relative adverbs "where, when"; 3) Asyndetically.
AR non-restrictive C gives some additional information about the A without restricting it, often separated by a comma (Mary, who is a friend of mine, is…). Introduced by: 1) The relative pronouns "who, which"; 2) The relative adverbs "where, when". The A of the continuative clause (which is a variant of ARNRC) is not one word but a whole clause (Her father was not at home, which was a relief to them).
AAC disclose the meaning of the A, which is expressed by an abstract noun; it's not separated from the PC by a comma (She had the idea that he's the one for her). Introduced chiefly by the conjunction "that", occasionally by the conjunction "whether" or by adverbs "how, why".
The complex sentence with attributive
