Make sentences using the modals in brackets to express the same as the underlined parts.

1. If you don’t want to go to the meeting, it’s not necessary to go. → You *needn’t* go to the meeting if you don’t want to. 2. Is it really necessary for us to attend the conference? → *Do we have to* attend the conference? 3. He’s late. The only explanation is that something has happened. → He *must* have had something happen. 4. It didn’t rain yesterday, so it was possible for us to jog. → We *were able to* jog yesterday.