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