English verb conjugation
CAN SPECULATE

Regular verb: speculate - speculated - speculated

Affirmation

Simple form	V-ing form
I can speculate you can speculate he can speculate we can speculate you can speculate they can speculate	I can be speculating you can be speculating he can be speculating we can be speculating you can be speculating they can be speculating
Perfect	V-ing perfect
I can have speculated you can have speculated he can have speculated we can have speculated you can have speculated they can have speculated	I can have been speculating you can have been speculating he can have been speculating we can have been speculating you can have been speculating they can have been speculating

Negation

Simple form	V-ing form
I can't speculate you can't speculate he can't speculate we can't speculate you can't speculate they can't speculate	I can't be speculating you can't be speculating he can't be speculating we can't be speculating you can't be speculating they can't be speculating
Perfect	V-ing perfect
I can't have speculated you can't have speculated he can't have speculated we can't have speculated you can't have speculated they can't have speculated	I can't have been speculating you can't have been speculating he can't have been speculating we can't have been speculating you can't have been speculating they can't have been speculating

Interrogative form

Simple form	V-ing form
can I speculate? can you speculate? can he speculate? can we speculate? can you speculate? can they speculate?	can I be speculating? can you be speculating? can he be speculating? can we be speculating? can you be speculating? can they be speculating?
Perfect	V-ing perfect
can I have speculated? can you have speculated? can he have speculated? can we have speculated? can you have speculated? can they have speculated?	can I have been speculating? can you have been speculating? can he have been speculating? can we have been speculating? can you have been speculating? can they have been speculating?

Interro-negative form

Simple form	V-ing form
can't I speculate? can't you speculate? can't he speculate? can't we speculate? can't you speculate? can't they speculate?	can't I be speculating? can't you be speculating? can't he be speculating? can't we be speculating? can't you be speculating? can't they be speculating?
Perfect	V-ing perfect
can't I have speculated? can't you have speculated? can't he have speculated? can't we have speculated? can't you have speculated? can't they have speculated?	can't I have been speculating? can't you have been speculating? can't he have been speculating? can't we have been speculating? can't you have been speculating? can't they have been speculating?