The Passive voice
General
Used in scientific speech
Form
TO BE + PARTICIPLE
- am / is / are
- was / were
- am / is / are being
- was / were being
- has been
- has been being
- had been
- will be
- would be
- am / is / are going to be
Transitive
Susan bought an umbrella
An umbrella was bought by Susan
Ditransitive
Susan gave Mike an umbrella
Mike was given an umbrella by Susan
Reporting verbs
People say Justin Bieber is a great singer
Justin Bieber is said to be a great singer
It is said that Justin Bieber is a great singer
Have sth
done
I have my hair cut
Types
To be in the past + part
To be in the present + part