In Difference between^x, Auxiliaries^x

1. What happened to you? 2. What did happen to you? The difference between is the inclusion of the auxiliary verb "do". This is added to secure emphasis, and is called the intensive form. Example: A: What happened to your face? Did you get into a fight? B: No. A: Then what did happen? Here's...

Thanks for answering to two of my questions, Rommie. So, in this case, B is suggesting indirectly. In fact it means; "I suggest that you use the computer if you need to sent it now." Does my understanding make sense? Now I'd like to ask one more thing. A. You might want to use it. B....

I'm confused....how to use these phrases properly in sentences. I think "before now" is used with present(present perfect) and past (past perfect) tense. Is this correct? What about "by now" ?? I often come across "by now" with auxiliary verbs. "He should be in his office by now." Is "by...