I suggested an edit a few hours ago, which is approved.

this raises a question in my mind, that is, whether "I'm ready for something" is equal to "I'm prepared for something"

and then another contributor removed the "that is", as a result we have

this raises a question in my mind whether ...

Is it grammatical? What is the structure of it.

"this" functions as a subject; "raises" functions as a predicate; "a question" functions as an object; "in my mind" is an adverbial phrase.

With "that is", the rest is a relative clause; without "that is", what is the rest?

1 Answer 1


The edit is correct and uncomplicates the indirect question as originally written by deleting "that is". Without "that is", the rest of the indirect question is a noun clause.

Whether is a conjunction and is similar to if. It is both formal and common to use the subordinate conjunction "whether" to introduce clauses after verbs of asking.

  • Thank you. Is my first example, the one with "that is", an indirect question?
    – WXJ96163
    Commented Mar 22, 2020 at 22:11
  • Yes. It is implied as "whether or not" the following two options in quotations are equal to one another. By the way, they are not since they do not mean the exact same thing.
    – Katherine
    Commented Mar 22, 2020 at 22:15
  • Thank you so much. Is it also a relative clause, right?
    – WXJ96163
    Commented Mar 22, 2020 at 22:19
  • Yes, in the original construction with "that is," it is a relative clause since it asserts something; however, it still is an indirect question.
    – Katherine
    Commented Mar 22, 2020 at 22:30
  • Thank you, that's very kind of you. Actually, I use "whether" a lot, e.g. "I am not sure whether I used the right tense", is that also an indirect question?
    – WXJ96163
    Commented Mar 22, 2020 at 22:35

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