English verb conjugation
CAN SKIRR

Regular verb: skirr - skirred - skirred

Affirmation

Simple form	V-ing form
I can skirr you can skirr he can skirr we can skirr you can skirr they can skirr	I can be skirring you can be skirring he can be skirring we can be skirring you can be skirring they can be skirring
Perfect	V-ing perfect
I can have skirred you can have skirred he can have skirred we can have skirred you can have skirred they can have skirred	I can have been skirring you can have been skirring he can have been skirring we can have been skirring you can have been skirring they can have been skirring

Negation

Simple form	V-ing form
I can't skirr you can't skirr he can't skirr we can't skirr you can't skirr they can't skirr	I can't be skirring you can't be skirring he can't be skirring we can't be skirring you can't be skirring they can't be skirring
Perfect	V-ing perfect
I can't have skirred you can't have skirred he can't have skirred we can't have skirred you can't have skirred they can't have skirred	I can't have been skirring you can't have been skirring he can't have been skirring we can't have been skirring you can't have been skirring they can't have been skirring

Interrogative form

Simple form	V-ing form
can I skirr? can you skirr? can he skirr? can we skirr? can you skirr? can they skirr?	can I be skirring? can you be skirring? can he be skirring? can we be skirring? can you be skirring? can they be skirring?
Perfect	V-ing perfect
can I have skirred? can you have skirred? can he have skirred? can we have skirred? can you have skirred? can they have skirred?	can I have been skirring? can you have been skirring? can he have been skirring? can we have been skirring? can you have been skirring? can they have been skirring?

Interro-negative form

Simple form	V-ing form
can't I skirr? can't you skirr? can't he skirr? can't we skirr? can't you skirr? can't they skirr?	can't I be skirring? can't you be skirring? can't he be skirring? can't we be skirring? can't you be skirring? can't they be skirring?
Perfect	V-ing perfect
can't I have skirred? can't you have skirred? can't he have skirred? can't we have skirred? can't you have skirred? can't they have skirred?	can't I have been skirring? can't you have been skirring? can't he have been skirring? can't we have been skirring? can't you have been skirring? can't they have been skirring?