4. Use commas to set off nonrestrictive clauses. Rule: Use commas to enclose clauses not essential to the meaning of a sentence. These nonessential clauses are called nonrestrictive. Clauses which are essential are called restrictive. Both restrictive and nonrestrictive clauses may begin with a relative pronoun (such as who, whom, whose, that
When you look at some of the excerpts ("have" vs "has"), it seems that the 3rd person is the more informal, casual type of usage. I also looked at an Ngram of "give" vs "gives" when using that string. In general, I don't think it is a matter of "correctness"--both types of usage have most likely been standard for a long, long time.
When trying to decided whether to use qui or que remember this simple rule: “qui + verb”, “que + personal pronoun or person”. La voiture qui est (qui + verb) rapide est dans le garage. The car that’s fast is in the garage. La voiture que je (qui + personal pronoun) vais acheter est rouge. The car that I am going to buy is red.
Whose vs. Who's. Mixing up "whose" and "who's" is a common grammar mistake. People tend to believe any word with a contraction, such as "who's," is possessive. But in fact, "whose" is the possessive form, while "who's" is a contraction for "who is" or "who has." Whose – Possessive pronoun.

Relative pronouns who, which, whose and that. I talked to the girl. who which whose. car had broken down in front of the shop. Mr Richards, who which whose. is a taxi driver, lives on the corner. I live in a house in Norwich, who which whose.

If you can replace it with “him” or “her,” use whom. Who should be used to refer to the subject of a sentence. Who is a pronoun used for Whom is a pronoun used for? The three most common relative pronouns are who, which and that. Who has two other forms, the object form whom and the possessive form whose. Who and whom are used mainly cEtG7AB.
  • heh7uvdcfi.pages.dev/544
  • heh7uvdcfi.pages.dev/556
  • heh7uvdcfi.pages.dev/131
  • heh7uvdcfi.pages.dev/505
  • heh7uvdcfi.pages.dev/479
  • heh7uvdcfi.pages.dev/479
  • heh7uvdcfi.pages.dev/182
  • heh7uvdcfi.pages.dev/452
  • whom whose who usage