English verb conjugation
CAN SPEC

Regular verb: spec - speced - speced

Affirmation

Simple form	V-ing form
I can spec you can spec he can spec we can spec you can spec they can spec	I can be specing you can be specing he can be specing we can be specing you can be specing they can be specing
Perfect	V-ing perfect
I can have speced you can have speced he can have speced we can have speced you can have speced they can have speced	I can have been specing you can have been specing he can have been specing we can have been specing you can have been specing they can have been specing

Negation

Simple form	V-ing form
I cannot spec you cannot spec he cannot spec we cannot spec you cannot spec they cannot spec	I cannot be specing you cannot be specing he cannot be specing we cannot be specing you cannot be specing they cannot be specing
Perfect	V-ing perfect
I cannot have speced you cannot have speced he cannot have speced we cannot have speced you cannot have speced they cannot have speced	I cannot have been specing you cannot have been specing he cannot have been specing we cannot have been specing you cannot have been specing they cannot have been specing

Interrogative form

Simple form	V-ing form
can I spec? can you spec? can he spec? can we spec? can you spec? can they spec?	can I be specing? can you be specing? can he be specing? can we be specing? can you be specing? can they be specing?
Perfect	V-ing perfect
can I have speced? can you have speced? can he have speced? can we have speced? can you have speced? can they have speced?	can I have been specing? can you have been specing? can he have been specing? can we have been specing? can you have been specing? can they have been specing?

Interro-negative form

Simple form	V-ing form
can I not spec? can you not spec? can he not spec? can we not spec? can you not spec? can they not spec?	can I not be specing? can you not be specing? can he not be specing? can we not be specing? can you not be specing? can they not be specing?
Perfect	V-ing perfect
can I not have speced? can you not have speced? can he not have speced? can we not have speced? can you not have speced? can they not have speced?	can I not have been specing? can you not have been specing? can he not have been specing? can we not have been specing? can you not have been specing? can they not have been specing?