#grammarhelp"

💡 FACT: “That” and “which” are often interchangeable.

❗️But not always … and grammar nerds will fight you on it.

“That” is restrictive → it limits or defines.

“Which” is nonrestrictive → it adds extra info (and needs commas).

Examples:

The book that has a red cover is mine. 📕 (There are multiple books; the red one is mine.)

The book, which has a red cover, is mine. 📕 (There’s one book, and oh btw—it’s red.)

✨ The difference is subtle, but it can change the meaning.