1

Is it grammatically correct?:

What letter isn't written on the board?

for the structure of Interrogative negative passive?

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  • Yes, it is correct grammatically. However, writing a letter on the board is odd. Do you mean writing a letter on the board, whiteboard or blackboard? Or do you mean posting a letter on the (bulletin) board??
    – Lambie
    Feb 10, 2018 at 15:31
  • On the whiteboard.
    – user275967
    Feb 10, 2018 at 15:34
  • 1
    Ok, well, then it's fine. letter as in A, B and C, not a missive, right?
    – Lambie
    Feb 10, 2018 at 18:57
  • 1
    "Which letter", since it is a choice within a defined group.
    – user3169
    Feb 11, 2018 at 2:03

1 Answer 1

1

What letter isn't written on the board?

is grammatically correct and, at the same time, ambiguous.

"letter" can mean:

  • letter of the alphabet;
  • text on a paper;

"board" can mean:

  • writing board (i.e. blackboard or whiteboard);
  • bulletin board
  • any thin flat (usually) rectangular, classically made of wood.

With physical objects, the verb "written" would exclude the bulletin boards, but considering the electronic "boards" the exclusion is no longer possible.

On the other hand, "what" suggests letters of the alphabet, rather than texts.

So examples of sentences without confusion could be:

Which letter of the alphabet isn't written on the whiteboard?

or:

Which message is not posted on the bulletin board?

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