how did you know represents a topic that has garnered significant attention and interest. "Did you know?" or "Do you know?" [closed]. Therefore, saying "did you know" asks if you have previously known something. "Do" is the present tense, so saying "do you know" would ask if you currently know. In relation to this, "How did you know?" vs.
"how do you know?" distinction. It's important to note that, when someone makes an assertion, the distinction between "how did you know" and "how do you know" seems to be that "how did you know" implies that the person in question is correct in their assertion. "How do you know" is normally an inquiry into the person's credentials, and often expresses that the assertion is incorrect and/or ungrounded. verbs - Meaning of "How'd you know?": "would", "did", or "do ....
E: I'll shoot my girlfriend if she cheats on me. = How would you know? because E's sentence is a future condition. Notice that I changed the contracted forms. I did that because the pronunciation of the spoken English sentences would change.
That doesn't mean that the written form would change. grammar - Do you know or did you know? - English Language & Usage Stack .... In the literal sense (i.e.
asking about the other person's knowledge) the past tense (did you know) asks if the person knew in the past and the present tense (do you know) asks if they know now. Both phrases are also commonly used idiomatically to introduce a new fact without really asking if it was known. In this sense, both past and present may be used interchangeably. Another key aspect involves, should I use "did you know" or "do you know" to introduce a fact?.
Because you've just told them! It's like when saying "Did you know strawberries aren't berries, but bananas are?", I didn't know if you'd already known about that factoid prior to my "question", but at the time I say it onward, I know you know it because I've just told you. Therefore, it'd be reasonable to use the past tense with "did". Do "You know..." Questions need question marks.
A question that's really an opinion: Someone says something stupid, so you say, "You know you sound like an idiot, right?" A question that's stating the obvious: Someone wants to leave, so you say, "You do know there's a door right there?" A question you know the answer to: Someone is sitting in your chair, and they know it's your chair. "Did you do it?" vs "Have you done it?"? Why did you do it is a fine way to ask about an event done in the past. Why have you done it implies there are consequences in the present still.
Did you do it asks: are you the person who did this/that?
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