are they really know each other or Do they really know each other?

are they really know each other vs Do they really know each other

The correct phrase is "do they really know each other?". The verb "do" is necessary to form a question in English. The phrase without "do" is not grammatically correct.

Last updated: March 30, 2024

are they really know each other

This phrase is not correct. It is missing the auxiliary verb "do" which is necessary to form a question in English.

The correct phrase should be "do they really know each other?" to form a question in English.

Do they really know each other

This phrase is correct and commonly used in English to form a question about whether two people know each other.

Use this phrase when you want to ask if two people have knowledge of each other.

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are they really know each other vs Do they really know each other