When we want to say that a certain predicate applies to a certain individual, we put the individual's name after the predicate's name. If we have a relational predicate, we can put all the individuals' names after the name of the relation. We'll also retain all the connectives and parentheses from sentential logic, with the same uses. More about open sentences and variables below. Some cats are furry.
Most cats are furry.
No cats are furry. I'm not buying drinks for people in China. So in the first example, my domain of discourse was the people in the room at the time. In the second example, the domain of discourse is probably merchandise in the warehouse, or something like that. Notice that the latter statement does not require me to buy drinks for people in China, because they fail to satisfy the antecedent of my conditional.