just heard this sentence: 你吃了午饭了吗？ I just heard this sentence: 你吃了午饭了吗？ So I wonder if the following sentence is possible: 你吃午饭了吗？ If the latter is possible, then what would be the difference between the two? (I guess there may be not much (yes? no?), but I'd still like to know if there is some difference)