How to change to passive voice: "People claim that the price of petrol has gone up."?

1 Answer

That the price of petrol has gone up is claimed by people.

Explanation:

We want to move the subject "people" to be an object (and so put it after the verb "claim". We now need a new subject and the only thing we have to work with is the clause "that the price of petrol has gone up":

That the price of petrol has gone up...some verb form of "claim"...people

If people are claiming that the price has gone up, then we can say that "it's claimed by people":

That the price of petrol has gone up is claimed by people.