please help me, i always had a problem trying to understand the use OF and OFF. My wife tried explaining, but i still fail to correct it. Is there a law or rule, or a way to understand the use of/off these 2 words that mess me up. Thanks.
'of' normally carries no meaning and just links words- cup of coffeee. It doesn't modify, just joins the words into a phrase. 'Off' means the opposite of 'on'- turn the lights off, lift to off the floor. In both cases it has a meaning- in the first, you stop the lights working, and in the second, you move something.