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 cannot speculate you cannot speculate he cannot speculate we cannot speculate you cannot speculate they cannot speculate	I cannot be speculating you cannot be speculating he cannot be speculating we cannot be speculating you cannot be speculating they cannot be speculating
Perfect	V-ing perfect
I cannot have speculated you cannot have speculated he cannot have speculated we cannot have speculated you cannot have speculated they cannot have speculated	I cannot have been speculating you cannot have been speculating he cannot have been speculating we cannot have been speculating you cannot have been speculating they cannot 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 I not speculate? can you not speculate? can he not speculate? can we not speculate? can you not speculate? can they not speculate?	can I not be speculating? can you not be speculating? can he not be speculating? can we not be speculating? can you not be speculating? can they not be speculating?
Perfect	V-ing perfect
can I not have speculated? can you not have speculated? can he not have speculated? can we not have speculated? can you not have speculated? can they not have speculated?	can I not have been speculating? can you not have been speculating? can he not have been speculating? can we not have been speculating? can you not have been speculating? can they not have been speculating?