I can tunnel you can tunnel she can tunnel we can tunnel you can tunnel they can tunnel
V-ing form
I can be tunnelling you can be tunnelling she can be tunnelling we can be tunnelling you can be tunnelling they can be tunnelling
Perfect
I can have tunnelled you can have tunnelled she can have tunnelled we can have tunnelled you can have tunnelled they can have tunnelled
V-ing perfect
I can have been tunnelling you can have been tunnelling she can have been tunnelling we can have been tunnelling you can have been tunnelling they can have been tunnelling
Negation
Simple form
I cannot tunnel you cannot tunnel she cannot tunnel we cannot tunnel you cannot tunnel they cannot tunnel
V-ing form
I cannot be tunnelling you cannot be tunnelling she cannot be tunnelling we cannot be tunnelling you cannot be tunnelling they cannot be tunnelling
Perfect
I cannot have tunnelled you cannot have tunnelled she cannot have tunnelled we cannot have tunnelled you cannot have tunnelled they cannot have tunnelled
V-ing perfect
I cannot have been tunnelling you cannot have been tunnelling she cannot have been tunnelling we cannot have been tunnelling you cannot have been tunnelling they cannot have been tunnelling
Interrogative form
Simple form
can I tunnel? can you tunnel? can she tunnel? can we tunnel? can you tunnel? can they tunnel?
V-ing form
can I be tunnelling? can you be tunnelling? can she be tunnelling? can we be tunnelling? can you be tunnelling? can they be tunnelling?
Perfect
can I have tunnelled? can you have tunnelled? can she have tunnelled? can we have tunnelled? can you have tunnelled? can they have tunnelled?
V-ing perfect
can I have been tunnelling? can you have been tunnelling? can she have been tunnelling? can we have been tunnelling? can you have been tunnelling? can they have been tunnelling?
Interro-negative form
Simple form
can I not tunnel? can you not tunnel? can she not tunnel? can we not tunnel? can you not tunnel? can they not tunnel?
V-ing form
can I not be tunnelling? can you not be tunnelling? can she not be tunnelling? can we not be tunnelling? can you not be tunnelling? can they not be tunnelling?
Perfect
can I not have tunnelled? can you not have tunnelled? can she not have tunnelled? can we not have tunnelled? can you not have tunnelled? can they not have tunnelled?
V-ing perfect
can I not have been tunnelling? can you not have been tunnelling? can she not have been tunnelling? can we not have been tunnelling? can you not have been tunnelling? can they not have been tunnelling?