Question

the problem cannot be solved overnight
make it active ​

Answer 1

How do you change 'The problem cannot be solved overnight' into an active voice?

The reason the answer isn’t immediately clear is that this is a “truncated passive.” That means the agent, the doer has been omitted. The full sentence is “The cannot be solved overnight by [you, somebody, the government].” We don’t know because the doer was omitted. So then it’s straightforward.

Take the subject and make it the object.

Take omitted object of “by” and make it the subject.

Now it reads “You cannot solve the problem.”

Add the modifier “overnight.”

You [The government, etc.] cannot solve the problem overnight.