to what extent

English as a Second Language English Vocabulary, Grammar and Idioms
1
  1. The question is to what extent we need it or use it.
  2. To what extent is this likely to improve the country’s economy?
  3. To what extent they are helping remains to be seen.
    Please correct the above?
    Please re-phrase if needed.
2

Personally I would use a comma after ‘the question is’ in (1).
3. sounds slightly awkward. I don’t think many people would choose to use that particular wqord order in that example.
Possibly:
The extent of their help remains to be seen.
though I would be tempted to simplfy that sentence to:
How much help they are giving remains to be seen.

3

If you put a comma after ‘is’ in (1), you would make the second part of the sentence into a question. If you leave it out, it remains a statement.

4

Alan,
The question is, to what extent we need it or use it?
The question is, to what extent do we need it or use it?
Which one is correct?

5

If you want to make it a full blown question, then you need to use the inversion: do we need …?