Relier Pairs PossibilitiesVersion en ligne revising modals for degrees of certainty in the past, present and future par Canan Schaerer 1 Look! What's that? It can't be a plane. 2 Happy birthday! Can you guess what it is? 3 I can't read this signature – can you make anything of it? 4 I'm starving! Is there anything to eat? 5 Someone's left their umbrella here. 6 Who's that sitting next to Andrew? 7 Someone was at the door a few minutes ago. 8 Do you think Gran's alright? She's not answering her phone. 9 I can't find my keys. 10 Eddie was very quiet this morning. 11 That's the doorbell. Do you think they're here already? 12 She must be his girlfriend. She might be having a nap. She often does after lunch It must be his dad. He looks just like him. You can't be hungry again! You've only just had lunch. It might be Laura's. She was in here earlier. It must have been the postman. He always comes at eight. It can't be a book - it's not heavy enough. Is it a video game or a DVD? It's flying too low. He must have been tired – he flew back from London last night. They can't be. They only left ten minutes ago and it takes an hour. Look, they're holding hands. You might have left them at work. The surname could be Smith. That looks like an 's'.