Sentence examples for know how old from inspiring English sources

"We don't know how old it is".

"I don't know how old he is.

Akon doesn't know how old he is.

"I did not know how old he was.

I wish I didn't know how old I was.

I don't even know how old they are anymore.

"I don't even know how old I look any more.

She did not even know how old she was.

Do you know how old your passport is?

"I know how old I am," he said.

Or, "The water doesn't know how old you are".