English file advanced 4b modal verbs (speculation/deduction)
Right or wrong? My glasses aren't in their usual place. Someone must move them.
Someone must have moved them
Right or wrong? A Do you know where Emma is? B She should be in the library. That's where she said she was going.
Right
Right or wrong? A What's that noise in the garage? B I think it can be the neighbour's cat.
it could / might be....