instruction:
Generate the answer for a given question. The question requires common knowledge of English. Make sure that the answer is in detail, long, consistent with the context, and requires general knowledge of English. To be less repetitive, please vary your language for each question. Give a proper explanation to answer, and if necessary, provide the definition of various terms. And conclude your answer if it's long. If you have used other resources (e.g., Merriam Webster's.) to answer the question, include citations in your answer. You don't need to paraphrase the context of your resources, but make sure that your answer is consistent and complete.
question:
Imagine you're in a bar and order a pint of beer, which is 3.20. You only have a 10 note but want to tip the barkeeper. As you can't use 'keep the change' for obvious reasons, what do you say to tip the barkeeper 80 pence, making the total price 4?.
answer:
I am occasionally in the same situation when I want to tip a taxi driver. Converting to your problem, I would say: Make it 4 pounds. or if that is not clear: Make it 4 pounds and keep the difference. This is in my country (Australia) where tipping is uncommon, however. Edit: Thinking about it even more, sometimes I add the word 'Just' to the front of the sentence. Not sure why.


question:
I just noticed that the word in the movie title The Pursuit of Happyness is spelled with a y instead of an i. But my spell checker highlights 'happyness' as a mistake. Why is it spelled differently here? Shouldn't it be happiness?.
answer:
From the article on Chris Gardner on ABC's site: The word 'happiness' in the title is deliberately misspelled, just as it was on the wall of a day care center where Gardner once sought care for his young son, Chris Jr., during some of his worst days.' Chris (Will Smith) even points out the misspelling to the Chinese care-giver that the mural decorating his son's daycare is spelled incorrectly. Chris wanted to make sure that his son was taught things the correct way, so that he could grow up to be an educated man and make something great of himself. Chris 'took offense' to the fact that the world happiness was spelled wrong on the wall and became irritated by it. But the word comes to signify Chris' own pursuit of happiness. To quote from the movie: It was right then that I started thinking about Thomas Jefferson on the Declaration of Independence and the part about our right to life, liberty, and the pursuit of happiness. And I remember thinking how did he know to put the pursuit part in there? That maybe happiness is something that we can only pursue and maybe we can actually never have it. No matter what.


question:
What's the difference between these two phrases?.
answer:

To add to Martha's answer: The simple past ('Did you see this') refers about an event in the past The present perfect ('Have you seen this') suggests a link with the present time. If 'this' is something you could have seen but cannot anymore (you should have been there seeing 'this' at the time, but it wouldn't have the same impact if you see it again now), then 'Did you see' is more appropriate. It is about an event that happened once in the past. If 'this' is something you can check out whenever you want, 'Have you seen' is more to the point, because it suggests that, if you haven't seen it in the past, you could consider seeing it now or in the near future. It is about an event which can happen again or is still relevant in the present.