1.Kelly CAN'T have left a message for him. -Не может быть, чтобы К оставила ему сообщение
Kelly COULD have left a message for him. - Келли могла бы оставить ему сообщение.
2. CAN he speak Spanish?
3. CAN i use your pen?
4.Anthony said that i COULD visit his cousin any day.i liked.
5.If we phone him,he CAN join us at the statia.