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