What is the differnece between these two sentences?'...kidding me...'thanks

0Nothing apart from the words chosen, to me 050010id1

0 This is something you say in informal conversation. Usually it's said with reduced forms, like this:02br
02br
01i00You gotta be kidding ( me ).02i02br
02br
00 Just that. It's assumed that if you say that, you mean that you don't think it's true, so there's no need to add the second part.02br
02br
00 Don't use this

0 Hi,02br
00can I take advantage of this thread to ask about "have got to" in "You gotta be kidding"?02br
00That "have got to" means "it is obvious that", it's a logical deduction. I once read here a post by Jim (I think), that "must" was the most common and natural choice when there is a logical deduction. Is "have got to" unnatural in place of "must"? I think "must" is

0 Your examples all sound natural to me. 0-

0 01blockquote

01cite10Grammar Geek12cite10Your examples all sound natural to me.12blockquote

10Very interesting. I'm pretty sure Jim said "have got to" was not very used, and "must" was the usual verb to choose. It [must/has got to] be something regional then, even though I have to say that "must" actually seems more common to me.

0 It's just a register difference. Stick to 01i00must02i00 unless (as in this case) you are deliberately trying to use a lower register to sound more slangy. The numbers below are my impressionistic guesses. (AmE)02br
02br
00 You must be kidding. R2.102br
00 You have to be kidding. R1.902br
00 You

0And "Yo! Yooz gotta wash your hands before you go out dere!" is perhaps a little lower than that 050010id1

0I understand, now it's clear. Thank you all. 050010id1

0Thanks for all your replies. I know more now. 05005102br
02br
00Best wishes,02br
00Ernest010id511id2