1. Make two sentences using the same word. Try it with the word at the end of one sentence and after
to in the other sentence. (The word must refer to an inanimate thing.)
2. Then combine the sentences with
to which, removing the
to phrase (because you've replaced it with
to which).
This is the store. I was referring to the store when I spoke to you yesterday.
This is the store to which I was referring when I spoke to you yesterday.
Do the same with
in or any other preposition.
I have a book. You can find many beautiful photos in the book .
I have a book in which you can find many beautiful photos.
_______
You don't have to put the common word at the end of the first sentence, but then the
which phrase and the whole second sentence will have to be moved to just after the common word.
The book is on sale today. I was referring to the book last week.
The book to which I was referring last week is on sale today.
The room was discovered by archaeologists in 1930. The treasure was hidden in the room.
The room in which the treasure was hidden was discovered by archaeologists in 1930.
_________
I'll leave it to you to practice with
of and other prepositions.
Maybe you could experiment and show us what you come up with.
CJ