Do these sentences mean the same?
-She cannot have gone to school.
-She couldn't have gone to school.
-She must not have gone to school.

-Can they have missed the bus?
-Could they have missed the bus?

-It can very well be your mother.
Is 'it can very well + verb' commonly used?

Question

Do these sentences mean the same?
-She cannot have gone to school.
-She couldn't have gone to school.
-She must not have gone to school.

-Can they have missed the bus?
-Could they have missed the bus?

-It can very well be your mother.
 Is 'it can very well + verb' commonly used?

Answer

Could not past of cannot