Hello Anglika,
Thanks for your response.

I think my previous example sentence might be not good.
Here's a new one. No. 1 was written by me and No. 2 was the correction by a teacher. I wonder why No. 1 is wrong. :roll:
Thank you.
I'm afraid I don't agree with your teacher.
No. 1 is wrong, I agree; but no. 2 isn't a huge improvement:
#1 The door was referred to his office. :cross: - except in Anglika's (jocular) interpretation.
#2 The door was used in reference to his office
Alternatively, "The word 'door' was
a reference to his office."
To answer your question, '"door"
refers to his office' (verb in the active voice); 'his office
is referred to by "door"' (verb in the passive voice). You
could use the verb in the passive voice in your sentence by adding 'as', but the meaning would be different (and ridiculous ;-)):
The door was referred to
as his office. [This would mean that people mistakenly used the word "office" when they meant his door!]
b