| A | B |
|---|
| Let's go for a picnic. | Is that a good idea? It's a bit cloudy. It might rain later. |
| Juan wasn't in class today. | He hates to miss lessons. He must be ill. |
| Mary's in the USA, isn't she? | She can't be. She starts her new job today. |
| If you go out, take an umbrella with you. | I will. It looks like it could rain later. |
| Is Ferdinand at work today? | He could be. He often works at the weekend. |
| I saw Helen driving a brand-new sports car yesterday. | She must have made a lot of money recently. |
| The police still haven't caught the robber. | He might have left the country to hide abroad. |
| Where did Eve stay in London last weekend? | Well, she can't have gone to a hotel--she can't afford it. |
| Paul and Anne should be here by now. | Yes. They might have got lost on the way over. |
| How did Jim get to the airport? | He can't have taken a bus, they don't run on Sundays. |
| Does anyone know who broke the printer? | It could have been anyone. We all use it. |
| I'm really surprised that Heidi didn't come to your party. | Yes. She must have forgotten about it. |
| How did my dad find out that I had failed the test? | Your teacher must have told him. |
| I asked Jan for the day off, and she shouted at me. | That's odd, she must have had a bad morning in the office. |
| How odd, there's no signal on my mobile. | You haven't paid your bill, so they must have cut you off. |
| I haven't seen Alison since lunchtime. | She was sick earlier, so she might have gone home. |
