English verb conjugation
CAN SPECK

Regular verb: speck - specked - specked

Affirmation

Simple form	V-ing form
I can speck you can speck he can speck we can speck you can speck they can speck	I can be specking you can be specking he can be specking we can be specking you can be specking they can be specking
Perfect	V-ing perfect
I can have specked you can have specked he can have specked we can have specked you can have specked they can have specked	I can have been specking you can have been specking he can have been specking we can have been specking you can have been specking they can have been specking

Negation

Simple form	V-ing form
I can't speck you can't speck he can't speck we can't speck you can't speck they can't speck	I can't be specking you can't be specking he can't be specking we can't be specking you can't be specking they can't be specking
Perfect	V-ing perfect
I can't have specked you can't have specked he can't have specked we can't have specked you can't have specked they can't have specked	I can't have been specking you can't have been specking he can't have been specking we can't have been specking you can't have been specking they can't have been specking

Interrogative form

Simple form	V-ing form
can I speck? can you speck? can he speck? can we speck? can you speck? can they speck?	can I be specking? can you be specking? can he be specking? can we be specking? can you be specking? can they be specking?
Perfect	V-ing perfect
can I have specked? can you have specked? can he have specked? can we have specked? can you have specked? can they have specked?	can I have been specking? can you have been specking? can he have been specking? can we have been specking? can you have been specking? can they have been specking?

Interro-negative form

Simple form	V-ing form
can't I speck? can't you speck? can't he speck? can't we speck? can't you speck? can't they speck?	can't I be specking? can't you be specking? can't he be specking? can't we be specking? can't you be specking? can't they be specking?
Perfect	V-ing perfect
can't I have specked? can't you have specked? can't he have specked? can't we have specked? can't you have specked? can't they have specked?	can't I have been specking? can't you have been specking? can't he have been specking? can't we have been specking? can't you have been specking? can't they have been specking?