"care for" and "care about" The doctors and nurses care for you. They take care of you. For example, they take your temperature, give you extra pillows, prescribe medications, and so on. Your friends, hearing that you are ill,

Yes, terminal punctuation inside the quote is American, and the rest of the world follows the logical practice of placing them outside. Anyway, the single/double quote is also, I think, an American thing - we just about NEVER use single quotes

I think the only difference between to underline and to underscore is that the latter is more often used in AmE. rgds, cairn