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I have always been a poor speller, so I have a handy dictionary app

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1 Re-saves

pick up a new tongue

Weather wasn't on our side

I apologize for not getting back to you yesterday, I was out of the office all day.

The easy way to tell which is technically correct is to substitute he and him for who and whom, then rearrange the word order to see which sounds right.“Who were you speaking to?” becomes “You were speaking to he” — which is clearly incorrect.