I get it

Thanks for all of you, guys! It's pretty clear. Now I got it! ))

And usually the verb "understand" is used at the present tense despite it could sound more natural to use it at the past tense. We do often find it at the present tense: Example Sofia: do you know that you aren't to go to the municipality without an ID card? Jack: Yes you're right. I underatand.

This is hard to talk about without an example. In a conversation, person A explains something. Person B says: "I understand." (This is neutral or more formal) or "I see." (This is conversational) or "I got it." (This is colloquial) "I understood" would normally not be used in the example above. It would be used in talking about a conversation that happened in the past.

No one's given an exhaustive answer. How boring. Elena: those are different ways to express that you have come understanding that phenomenon/thing/situation... You have the faculty to choose among: - I got it (that literally means "I've received the message, I've understood it) - I see (that literally means "I see/I have full awareness of what you have said to me, I've understood it). For last, you can use any form you do prefer, it is natural and obvious that using "understand" results to be more formal while in the colloquial speech the other two forms might be more used. I do hope you've understood the difference ;)