This is more of an expression ... It is used when we want to say that someone needs to do something before something negative happens or could happen. Here are some examples: - He'd better do his homework if he wants to pass the class. - You'd better go to work now or you will be late In your example "You'd better manicure your nails." There was no context provided with the example however, let's say someone is going out on a date. So, someone says, "You'd better manicure your nails." Which says you need to manicure your nails or your date may think your nails are ugly or you don't take care of yourself. Hope this helps

The words mean the same which is basically a long seat covered with fabric for two or more people. Most people use couch when speaking. Example: Have a seat on the couch. Or I left the book on the couch. Sofa is not used as much in every day conversation. Oftentimes the word sofa is used by furniture stores when they are selling couches (don't know why) and most people know that sofa is the same as a couch. The more common word for you to use would be couch. Hope this helps

Depending on if you want to find out how the business is going to work both sentences are correct. However, if you are wanting to ask how probable it is for the person to open a business without any money you may want to ask something else. If someone were to say that to me in conversation and either they told me or I knew they did not have money I would actually ask "How is that going to work?" which would be a shorter way of saying "How is that going to work out?" which implies how are you going to open a business without money. Another way that I might say it is "How does that work?" which is to imply you want to open a business but, how are you going to do that without money. Although asking it that way may not be as polite or friendly to the person you are speaking to. A better way to ask this question would be "How do you plan to do that? or "How will you plan to do that?

Here are some questions I use. Hope they help Where are you from? What type of work do you do? Where did you go to school/college? What do you like to do in your spare time? Where have you traveled to? Have you ever been to my country? How long have you been studying (name of language)?