I can speculate you can speculate he can speculate we can speculate you can speculate they can speculate
Forme en V-ing
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
I can have speculated you can have speculated he can have speculated we can have speculated you can have speculated they can have speculated
Perfect en V-ing
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
Négation
Forme simple
I cannot speculate you cannot speculate he cannot speculate we cannot speculate you cannot speculate they cannot speculate
Forme en V-ing
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
I cannot have speculated you cannot have speculated he cannot have speculated we cannot have speculated you cannot have speculated they cannot have speculated
Perfect en V-ing
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
Forme interrogative
Forme simple
can I speculate? can you speculate? can he speculate? can we speculate? can you speculate? can they speculate?
Forme en V-ing
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
can I have speculated? can you have speculated? can he have speculated? can we have speculated? can you have speculated? can they have speculated?
Perfect en V-ing
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?
Forme interro-négative
Forme simple
can I not speculate? can you not speculate? can he not speculate? can we not speculate? can you not speculate? can they not speculate?
Forme en V-ing
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
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?
Perfect en V-ing
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?