which

which

A child points to which of the two identical boxes contains a toy.

Definition

  1. Pronoun (Interrogative):

    • Used to ask for specific information about one or more items from a known set.
    • Example: Which is your favorite color? (Asking for a choice from known colors.)

  2. Pronoun (Relative):

    • Refers to a previously mentioned noun or noun phrase, introducing a clause that gives more information about it.
    • Example: The book which is on the table is mine. (The clause "which is on the table" describes the book.)

  3. Determiner:

    • Used before a noun to ask for information about a specific item or choice from a group.
    • Example: Which car did you buy? (Asking for the specific car among options.)
Usage Examples

  • Interrogative Pronoun:

    • Which of these dresses fits you best? (Asking for a choice among the dresses.)
    • I can't tell which is which. (Unable to distinguish between items.)

  • Relative Pronoun:

    • The house, which was built in 1920, has a lovely garden. (The clause adds detail about the house.)
    • She gave me a gift, which I really appreciated. (The clause refers to the gift.)

  • Determiner:

    • Which route should we take? (Asking for a specific route among options.)
    • Which student won the prize? (Asking for the specific student.)
Advanced Usage

  • "which" in non-restrictive clauses: Adds extra information that is not essential to the meaning.

    • My laptop, which is only a year old, has stopped working. (The clause gives additional detail; the sentence would still be clear without it.)

  • "which" in restrictive clauses: Defines the noun more precisely.

    • The laptop which is on the desk is mine. (The clause identifies which laptop; without it, the meaning is unclear.)

  • "which" after prepositions: Formal usage where "which" follows a preposition.

    • The matter about which we spoke is resolved. (Formal; in everyday speech, "The matter we spoke about is resolved" is more common.)
Variants and Related Words

  • Whichsoever (formal pronoun): any one of a set; whichever.

    • Choose whichsoever you prefer. (Pick any one you like.)

  • Which way (phrase): in what direction or manner.

    • Which way did they go? (Asking for a direction.)
Synonyms

  • What (interrogative): used when the set is unknown or unlimited.

    • What is your name? (No specific set implied.)
    • Which is your name? (Implies a list of names.)

  • Whichever (relative): any one that; no matter which.

    • Take whichever you like. (Any choice is acceptable.)
Related Idioms

  • "know which side one's bread is buttered on": to be aware of where one's interests lie.

    • He always agrees with the boss; he knows which side his bread is buttered on. (He acts to protect his own benefit.)

  • "not know which way to turn": to be confused or uncertain about what to do.

    • After losing his job, he didn't know which way to turn. (He was unsure of his next steps.)