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