Don't worry, most Americans don't know the difference between effect and affect. I will get you a coffee, means I will go to 7/11 and buy a cup of coffee, and bring it to you. I will get your coffee, means you already have a cup of coffee, it is on your desk getting cold, I will bring it to you. My, Your, His, Her, Our, Their = "possessive" words

Most Americans pronounce "affect" (verb) and "effect" (noun) the same way, as "UH-fect." Some Americans do pronounce "effect" with a very slight "EH" sound, so it's a little more like "EH-fect," but the difference is hard to hear. And Phil is right -- most Americans confuse the two words. On a side note: When "affect" is used as a NOUN, it's pronounced as "AA-fect" (with the same A sound as is "cat" or "back"). When "effect" is used as a VERB, it's usually pronounced more like "EH-fect." These usages are much more rare, though.