Dear All,
^^!! This is too difficult for me.Not until did he arrive home he found he'd left it in the restaurant.
Not until he arrived home did he find he'd left it in the restaurant.
I can't understand what it exactly means. :(
Is this what it means?
He did not find that he had left it in the restaurant until he arrived home.
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When will we use this sentence pattern?
Why do we use this sentence pattern?
Thanks !

English Teacher