Where and in which

[Hiya Raymond]

Are those three sentences correct? all the same? Thanks!

This is the room in which we stayed.

This is the room which we stayed in.

This is the room where we stayed.

 

[Rover_KE]

They need full stops to make them correct.

Then they mean the same.

 

[BobK]

And some pedants would prefer a fourth option:


This is the room that we stayed in.

The trouble for these people is that they are forced to apply one of two groundless prescriptive rules that are mutually exclusive "(that for a defining subordinate clause" and "not ending a sentence with a preposition")

b
PS People interested in etymology may like to imagine chains attached to each arm of the person choosing between the two 'rules'. The Greek for chains is πεδαι (pedai).