I can marvel you can marvel he can marvel we can marvel you can marvel they can marvel
V-ing form
I can be marvelling you can be marvelling he can be marvelling we can be marvelling you can be marvelling they can be marvelling
Perfect
I can have marvelled you can have marvelled he can have marvelled we can have marvelled you can have marvelled they can have marvelled
V-ing perfect
I can have been marvelling you can have been marvelling he can have been marvelling we can have been marvelling you can have been marvelling they can have been marvelling
Negation
Simple form
I can't marvel you can't marvel he can't marvel we can't marvel you can't marvel they can't marvel
V-ing form
I can't be marvelling you can't be marvelling he can't be marvelling we can't be marvelling you can't be marvelling they can't be marvelling
Perfect
I can't have marvelled you can't have marvelled he can't have marvelled we can't have marvelled you can't have marvelled they can't have marvelled
V-ing perfect
I can't have been marvelling you can't have been marvelling he can't have been marvelling we can't have been marvelling you can't have been marvelling they can't have been marvelling
Interrogative form
Simple form
can I marvel? can you marvel? can he marvel? can we marvel? can you marvel? can they marvel?
V-ing form
can I be marvelling? can you be marvelling? can he be marvelling? can we be marvelling? can you be marvelling? can they be marvelling?
Perfect
can I have marvelled? can you have marvelled? can he have marvelled? can we have marvelled? can you have marvelled? can they have marvelled?
V-ing perfect
can I have been marvelling? can you have been marvelling? can he have been marvelling? can we have been marvelling? can you have been marvelling? can they have been marvelling?
Interro-negative form
Simple form
can't I marvel? can't you marvel? can't he marvel? can't we marvel? can't you marvel? can't they marvel?
V-ing form
can't I be marvelling? can't you be marvelling? can't he be marvelling? can't we be marvelling? can't you be marvelling? can't they be marvelling?
Perfect
can't I have marvelled? can't you have marvelled? can't he have marvelled? can't we have marvelled? can't you have marvelled? can't they have marvelled?
V-ing perfect
can't I have been marvelling? can't you have been marvelling? can't he have been marvelling? can't we have been marvelling? can't you have been marvelling? can't they have been marvelling?