I can shovel you can shovel he can shovel we can shovel you can shovel they can shovel
V-ing form
I can be shovelling you can be shovelling he can be shovelling we can be shovelling you can be shovelling they can be shovelling
Perfect
I can have shovelled you can have shovelled he can have shovelled we can have shovelled you can have shovelled they can have shovelled
V-ing perfect
I can have been shovelling you can have been shovelling he can have been shovelling we can have been shovelling you can have been shovelling they can have been shovelling
Negation
Simple form
I cannot shovel you cannot shovel he cannot shovel we cannot shovel you cannot shovel they cannot shovel
V-ing form
I cannot be shovelling you cannot be shovelling he cannot be shovelling we cannot be shovelling you cannot be shovelling they cannot be shovelling
Perfect
I cannot have shovelled you cannot have shovelled he cannot have shovelled we cannot have shovelled you cannot have shovelled they cannot have shovelled
V-ing perfect
I cannot have been shovelling you cannot have been shovelling he cannot have been shovelling we cannot have been shovelling you cannot have been shovelling they cannot have been shovelling
Interrogative form
Simple form
can I shovel? can you shovel? can he shovel? can we shovel? can you shovel? can they shovel?
V-ing form
can I be shovelling? can you be shovelling? can he be shovelling? can we be shovelling? can you be shovelling? can they be shovelling?
Perfect
can I have shovelled? can you have shovelled? can he have shovelled? can we have shovelled? can you have shovelled? can they have shovelled?
V-ing perfect
can I have been shovelling? can you have been shovelling? can he have been shovelling? can we have been shovelling? can you have been shovelling? can they have been shovelling?
Interro-negative form
Simple form
can I not shovel? can you not shovel? can he not shovel? can we not shovel? can you not shovel? can they not shovel?
V-ing form
can I not be shovelling? can you not be shovelling? can he not be shovelling? can we not be shovelling? can you not be shovelling? can they not be shovelling?
Perfect
can I not have shovelled? can you not have shovelled? can he not have shovelled? can we not have shovelled? can you not have shovelled? can they not have shovelled?
V-ing perfect
can I not have been shovelling? can you not have been shovelling? can he not have been shovelling? can we not have been shovelling? can you not have been shovelling? can they not have been shovelling?