TASK DEFINITION: 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.
PROBLEM: Most grammar checkers are capable of detecting the the misuse of 'your' and 'you're'; providing the necessary correction. I'm curious though, is there any sentence that can be constructed where replacing 'your' with 'you're' keeps the sentence grammatically correct, but changes the meaning? If this is not possible, what grammar rules are in place that prevents these edge cases from occurring?.

SOLUTION: a. I love you and your bananas. b. I love you and you're bananas. This particular case depends on the your/you're coming after an independent clause followed by 'and,' since its feasibility depends on functioning either as a second direct object or as another independent clause. It also depends on the noun serving either as a thing that someone might be in possession of (the bananas we eat) or as an adjective or noun complement describing a person (bananas=crazy). Easiest if that noun is plural or uncountable. The same sentence could be constructed with nuts, garbage, and other nouns which I'll let you brainstorm because my stormer hurts. You can also (and thanks to @Barmar for drawing attention to this) use verbs, in which case they act as a gerund with the possessive pronoun and a present participle with the 'you're.' As in: a. I love you and your cooking. b. I love you and you're cooking. Or: a. I despise you and your smoking. b. I despise you and you're smoking.

PROBLEM: Possible Duplicate: When someone asks, 'How are you?' Every time when my colleges from USA ask me 'How are you?' I don't know what should I answer. I think that answer like 'Fine, thanks. What about you?' is not perfect. Could you provide patterns for such situation?.

SOLUTION: Fine, thanks. What about you? There's nothing wrong with your answer, although it might get tiresome if you word it exactly the same way, every time you're asked. But the solution for that is to merely use a few simple variations: I'm doing great today - and you? Doing well, thanks. How about you? Not bad, yourself? Thanks for asking, I'm doing fine. I think it's usually best to avoid clever responses to such a standard question, particularly when you're with new acquaintences. Sure, you could reply with something like, 'I'm happy as a clam,' but that's not very professional, and it would probably undermine your credibility rather than enhance it. Such jocular ways of answering are best left said among close acquaintences when everyone is kidding around.

PROBLEM: Is there a semantic difference between engine and motor? In some cases, would the use of one or the other word be technically incorrect?.

SOLUTION:
I like the definitions provided by WordNet and their definition is the way I've understood the difference: A motor is a machine that converts other forms of energy into mechanical energy and so imparts motion. An engine is a motor that converts thermal energy to mechanical work. wordnetweb.princeton.edu So an engine is a specific type of motor. That's why it's not incorrect to speak of a motorboat, or a motorcar, or a motor speedway, even if the boat or car is clearly powered by combustion. Note that if there's no combustion, there's no engine. Purely electric cars don't have engines. As nouns, motor can also refer to a nonspecific agent that causes motion: 'happiness is the aim of all men and the motor of all action', and engine can refer to something used to achieve a purpose: 'an engine of change', a railway locomotive, or a machine used in warfare: 'medieval engines of war'.