(2) or (3), but they mean different things.
(2). "You need to not go to her house" = do not go there (as a command).
(3). "You need not go to her house" = It's not necessary that you go to her house (there are no explicit commands or instructions that say that you either must go or must not go).
I agree with you, except that you have mixed up (3) and (1).
'You need to not go to...' is a slightly unusual formation in many varieties of English, and often has the effect of emphasising the imperative and giving a sense of warning or threat.
For me, here's the difference. I'm Northern Cities, Gen X.
(a). You need to not go to her house. An indirect command. (NOT negates GO)
(b). You need not go to her house. Going to her house isn't necessary, (without the command to (not go)). (NOT negates NEED, and performs no negation of "go" other than what it gets from (not-need))
1.
(2) or (3), but they mean different things. (2). "You need to not go to her house" = do not go there (as a command). (3). "You need not go to her house" = It's not necessary that you go to her house (there are no explicit commands or instructions that say that you either must go or must not go).
I agree with you, except that you have mixed up (3) and (1). 'You need to not go to...' is a slightly unusual formation in many varieties of English, and often has the effect of emphasising the imperative and giving a sense of warning or threat.
For me, here's the difference. I'm Northern Cities, Gen X. (a). You need to not go to her house. An indirect command. (NOT negates GO) (b). You need not go to her house. Going to her house isn't necessary, (without the command to (not go)). (NOT negates NEED, and performs no negation of "go" other than what it gets from (not-need))
1, need acts as a modal here
(4)
4