English verb conjugation
CAN SHIRR

Regular verb: shirr - shirred - shirred

Affirmation

Simple form	V-ing form
I can shirr you can shirr he can shirr we can shirr you can shirr they can shirr	I can be shirring you can be shirring he can be shirring we can be shirring you can be shirring they can be shirring
Perfect	V-ing perfect
I can have shirred you can have shirred he can have shirred we can have shirred you can have shirred they can have shirred	I can have been shirring you can have been shirring he can have been shirring we can have been shirring you can have been shirring they can have been shirring

Negation

Simple form	V-ing form
I can't shirr you can't shirr he can't shirr we can't shirr you can't shirr they can't shirr	I can't be shirring you can't be shirring he can't be shirring we can't be shirring you can't be shirring they can't be shirring
Perfect	V-ing perfect
I can't have shirred you can't have shirred he can't have shirred we can't have shirred you can't have shirred they can't have shirred	I can't have been shirring you can't have been shirring he can't have been shirring we can't have been shirring you can't have been shirring they can't have been shirring

Interrogative form

Simple form	V-ing form
can I shirr? can you shirr? can he shirr? can we shirr? can you shirr? can they shirr?	can I be shirring? can you be shirring? can he be shirring? can we be shirring? can you be shirring? can they be shirring?
Perfect	V-ing perfect
can I have shirred? can you have shirred? can he have shirred? can we have shirred? can you have shirred? can they have shirred?	can I have been shirring? can you have been shirring? can he have been shirring? can we have been shirring? can you have been shirring? can they have been shirring?

Interro-negative form

Simple form	V-ing form
can't I shirr? can't you shirr? can't he shirr? can't we shirr? can't you shirr? can't they shirr?	can't I be shirring? can't you be shirring? can't he be shirring? can't we be shirring? can't you be shirring? can't they be shirring?
Perfect	V-ing perfect
can't I have shirred? can't you have shirred? can't he have shirred? can't we have shirred? can't you have shirred? can't they have shirred?	can't I have been shirring? can't you have been shirring? can't he have been shirring? can't we have been shirring? can't you have been shirring? can't they have been shirring?