Why couldn't I do it vs Why I couldn't do it

The correct phrase is "why couldn't I do it". In English, the word order for questions is typically subject-auxiliary verb-main verb. Therefore, the auxiliary verb 'couldn't' should come before the subject 'I'. The second phrase, "why I couldn't do it", is not correct as it does not follow the standard question structure.

Last updated: March 31, 2024 • 4214 views

Why couldn't I do it

This phrase is correct and commonly used in English.

This phrase is the correct way to form a question in English, with the auxiliary verb 'couldn't' before the subject 'I'.

Show examples from the web [+]

So why couldn't I do it?
So why couldn't I do it?
That's why I couldn't do it.
Why couldn't I just - why couldn't I just do it?
Why I couldn't do it?

Why I couldn't do it

This phrase is not correct in English.

This phrase does not follow the standard question structure in English, where the auxiliary verb should come before the subject.

Show examples from the web [+]

That's why I couldn't do it.
Why I couldn't do it?
Why I couldn't do nothing about it?
Which is why I couldn't let him do it... full of bursting...
So why couldn't I do it?
Why couldn't I just - why couldn't I just do it?
So why couldn't I do it?

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Why couldn't I do it vs Why I couldn't do it