I can enamel you can enamel he can enamel we can enamel you can enamel they can enamel
V-ing form
I can be enamelling you can be enamelling he can be enamelling we can be enamelling you can be enamelling they can be enamelling
Perfect
I can have enamelled you can have enamelled he can have enamelled we can have enamelled you can have enamelled they can have enamelled
V-ing perfect
I can have been enamelling you can have been enamelling he can have been enamelling we can have been enamelling you can have been enamelling they can have been enamelling
Negation
Simple form
I cannot enamel you cannot enamel he cannot enamel we cannot enamel you cannot enamel they cannot enamel
V-ing form
I cannot be enamelling you cannot be enamelling he cannot be enamelling we cannot be enamelling you cannot be enamelling they cannot be enamelling
Perfect
I cannot have enamelled you cannot have enamelled he cannot have enamelled we cannot have enamelled you cannot have enamelled they cannot have enamelled
V-ing perfect
I cannot have been enamelling you cannot have been enamelling he cannot have been enamelling we cannot have been enamelling you cannot have been enamelling they cannot have been enamelling
Interrogative form
Simple form
can I enamel? can you enamel? can he enamel? can we enamel? can you enamel? can they enamel?
V-ing form
can I be enamelling? can you be enamelling? can he be enamelling? can we be enamelling? can you be enamelling? can they be enamelling?
Perfect
can I have enamelled? can you have enamelled? can he have enamelled? can we have enamelled? can you have enamelled? can they have enamelled?
V-ing perfect
can I have been enamelling? can you have been enamelling? can he have been enamelling? can we have been enamelling? can you have been enamelling? can they have been enamelling?
Interro-negative form
Simple form
can I not enamel? can you not enamel? can he not enamel? can we not enamel? can you not enamel? can they not enamel?
V-ing form
can I not be enamelling? can you not be enamelling? can he not be enamelling? can we not be enamelling? can you not be enamelling? can they not be enamelling?
Perfect
can I not have enamelled? can you not have enamelled? can he not have enamelled? can we not have enamelled? can you not have enamelled? can they not have enamelled?
V-ing perfect
can I not have been enamelling? can you not have been enamelling? can he not have been enamelling? can we not have been enamelling? can you not have been enamelling? can they not have been enamelling?