I can quell you can quell he can quell we can quell you can quell they can quell
V-ing form
I can be quelling you can be quelling he can be quelling we can be quelling you can be quelling they can be quelling
Perfect
I can have quelled you can have quelled he can have quelled we can have quelled you can have quelled they can have quelled
V-ing perfect
I can have been quelling you can have been quelling he can have been quelling we can have been quelling you can have been quelling they can have been quelling
Negation
Simple form
I can't quell you can't quell he can't quell we can't quell you can't quell they can't quell
V-ing form
I can't be quelling you can't be quelling he can't be quelling we can't be quelling you can't be quelling they can't be quelling
Perfect
I can't have quelled you can't have quelled he can't have quelled we can't have quelled you can't have quelled they can't have quelled
V-ing perfect
I can't have been quelling you can't have been quelling he can't have been quelling we can't have been quelling you can't have been quelling they can't have been quelling
Interrogative form
Simple form
can I quell? can you quell? can he quell? can we quell? can you quell? can they quell?
V-ing form
can I be quelling? can you be quelling? can he be quelling? can we be quelling? can you be quelling? can they be quelling?
Perfect
can I have quelled? can you have quelled? can he have quelled? can we have quelled? can you have quelled? can they have quelled?
V-ing perfect
can I have been quelling? can you have been quelling? can he have been quelling? can we have been quelling? can you have been quelling? can they have been quelling?
Interro-negative form
Simple form
can't I quell? can't you quell? can't he quell? can't we quell? can't you quell? can't they quell?
V-ing form
can't I be quelling? can't you be quelling? can't he be quelling? can't we be quelling? can't you be quelling? can't they be quelling?
Perfect
can't I have quelled? can't you have quelled? can't he have quelled? can't we have quelled? can't you have quelled? can't they have quelled?
V-ing perfect
can't I have been quelling? can't you have been quelling? can't he have been quelling? can't we have been quelling? can't you have been quelling? can't they have been quelling?