staying

all look ok to me

MitrielI always mix this up... Which one is correct?

How long are you going to stay there?

All of them sound ok.....

To some degree, the meaning "how long are you going to stay there / for" is slightly different to that of "how will you be there /for?

Correct me if I am wrong.

The 'for' is unnecessary, and adds nothing to the meaning. The same for 'at' in, 'Where are my keys at?'

Oh, well... At least I didn't say anything stupid:)

Thanks for all of you!:)

Oh, by the way...

thanks for all of you

or

thanks, all of you ?

In this situation, you can say, "Thanks to all of you."

And I can say, "You're welcome."

thanks for that:)

DavkettThe 'for' is unnecessary, and adds nothing to the meaning. The same for 'at' in, 'Where are my keys at?'

What about the following sentence?

Which univeristy/where are you studying at?

In this case, at is not a must as well, right?

Although these two seem unlikely in informal conversation, they are grammatically preferred:

At which university are you studying?

Which university is it where you are studying?