PASSIVE. All schools teach math . (active) Math is taught in all schools. (passive) Somebody built this house in 1935. (active) This house was built in 1935. (passive). We use passive:. To talk about processes:
All schools teachmath. (active)
Mathis taught in all schools. (passive)
Somebodybuiltthis house in 1935. (active)
This housewas built in 1935. (passive)
E.g. Flour is made from cereal grains such as wheat and rye. It is used to make bread and cakes.
E.g. (from a newspaper report) The country has been affected by flooding; hundreds of people have been evacuated.
E.g. The house was built in 1888. – we don’t say ‘by some builders’
E.g. Hamlet was written by Shakespeare.
We use HAVE SOMETHING DONE to say that we arrange for somebody else to do something for us. Compare:
Lisa repaired the roof. (= she repaired it herself)
Lisa had the roof repaired. (= she arranged for somebody else to repair it)
B: I’m afraid I _______ (not/the film/develop) yet.
B: That’s right, but it’s OK now. I _______ (it/repair).