I wonder whether it would be grammatical to pose a question in the form "A is B?" in cases where it is obvious it is a question rather than a statement?
To what extent such sentences perceived incorrect by the native speakers?
I wonder whether it would be grammatical to pose a question in the form "A is B?" in cases where it is obvious it is a question rather than a statement?
To what extent such sentences perceived incorrect by the native speakers?
It is acceptable, but it is not used to request new information: it is idiomatic only when when it requests confirmation either of what you have just heard or of an inference from what you have just heard. Some typical uses:
A: Hal just told me that Kelly got the promotion.
B: Kelly Carson's the new Director of Marketing?
A: Yeah, who'da thunk it!A: Then you lock down the set screw—
B: You lock it down here?
A: No, here.A: I'm heading out now, gotta get downtown.
B: You've got tickets to the game?
A: Right behind home plate.
As you see, this sort of question calls for a yes-or-no answer.