What is wich or which?

Here's information about "which" vs. "that," formatted in Markdown with links:

Which vs. That

The words "which" and "that" are both relative pronouns, used to introduce clauses that modify nouns. However, they are not interchangeable. Understanding the difference is crucial for clear and precise writing.

• That: Introduces a restrictive clause (also called an essential clause). A restrictive clause is essential to the meaning of the sentence. It limits or defines the noun it modifies. The sentence would not make sense without the restrictive clause. No commas are needed to set off a restrictive clause. See more about Restrictive Clauses.

  • Example: The car that I bought last week is already having problems. (The clause "that I bought last week" is essential to identify which car is having problems. Removing the clause changes the meaning significantly.)

• Which: Introduces a nonrestrictive clause (also called a nonessential clause). A nonrestrictive clause provides additional, nonessential information about the noun it modifies. The sentence still makes sense if the nonrestrictive clause is removed. Commas are used to set off a nonrestrictive clause. More about Nonrestrictive Clauses.

  • Example: My car, which is a vintage model, is in excellent condition. (The clause "which is a vintage model" provides extra information but isn't crucial for identifying which car. The reader knows it is "my car.")

In summary:

• That: Defining information, no commas.
• Which: Extra information, with commas.

Important Notes:

• The distinction is primarily observed in American English. In British English, "which" can sometimes be used in restrictive clauses, although "that" is still preferred.

• When in doubt, consider whether the clause is essential to the meaning of the sentence. If it is, use "that" without commas. If it isn't, use "which" with commas. This concept is also known as Essential vs. Nonessential Clauses.

• Choosing the right one will improve your Writing Clarity.