For

[Rachel Adams]

Hello.
Should I add 'for' at the end of my question or is it wrong?
'She studied for three hours. How long did she study for?'

 

[teechar]

No, it's not wrong. You can use it at the end of that question. In fact, I would prefer it.

 

[GoesStation]

It's not necessary, and I wouldn't use it, but it's grammatical and natural.

 

[Yankee]

Even though the "never end a sentence with a preposition rule" has apparently become obsolete, and as an "old school practitioner" I would not use it. But if you must you could say,
"For how long did she study?".

 

[Rachel Adams]

No, it's not wrong. You can use it at the end of that question. In fact, I would prefer it.

It's not wrong in similar sentences, is it? For example: 'How long were you on holiday for?'

 

[teechar]

'How long were you on holiday for?'

Yes, that works.

 

[Yankee]

Yes, that works.

Regardless of its placement, in that example and with use of "how long", "for" is unnecessary.

 

[teechar]

Regardless of its placement, in that example and with the use of "how long", "for" is unnecessary.

We've been there already.

 

[Yankee]

As is "the". That is, You don't need an article when talking about things in general or is abstract.

 

[PeterCW]

I would say it but would feel uncomfortable writing it.

 

[teechar]

That is, you don't need an article when talking about things in general or is abstract.

What is the subject of that "is" above?