"Don't you know which" vs "Don't you know that"

Question

"Don't you know which" vs "Don't you know that"

Both phrases are correct, but they are used in different contexts. 'Don't you know that' is used when you are asking someone if they are aware of a specific fact or information. 'Don't you know which' is used when you are asking someone to choose between options or identify a specific item from a group.

Last Updated: March 30, 2024

This phrase is used to prompt someone to make a choice or identify a particular item from a selection.

Examples:

Don't you know which dress to wear?
Don't you know which book I'm talking about?
Don't you know which bus to take?

This phrase is used to question someone's knowledge about a particular piece of information or fact.

Examples:

Don't you know that smoking is bad for your health?
Don't you know that the meeting has been rescheduled?
Don't you know that she is allergic to peanuts?

Answer 1

Don't you know which

This phrase is correct and commonly used in English when asking someone to choose between options or identify a specific item from a group.

Answer 2

Don't you know that

This phrase is correct and commonly used in English when asking someone if they are aware of a specific fact or information.

"Don't you know which" vs "Don't you know that"

Don't you know which

Don't you know that

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