I can screech you can screech he can screech we can screech you can screech they can screech
Forme en V-ing
I can be screeching you can be screeching he can be screeching we can be screeching you can be screeching they can be screeching
Perfect
I can have screeched you can have screeched he can have screeched we can have screeched you can have screeched they can have screeched
Perfect en V-ing
I can have been screeching you can have been screeching he can have been screeching we can have been screeching you can have been screeching they can have been screeching
Négation
Forme simple
I cannot screech you cannot screech he cannot screech we cannot screech you cannot screech they cannot screech
Forme en V-ing
I cannot be screeching you cannot be screeching he cannot be screeching we cannot be screeching you cannot be screeching they cannot be screeching
Perfect
I cannot have screeched you cannot have screeched he cannot have screeched we cannot have screeched you cannot have screeched they cannot have screeched
Perfect en V-ing
I cannot have been screeching you cannot have been screeching he cannot have been screeching we cannot have been screeching you cannot have been screeching they cannot have been screeching
Forme interrogative
Forme simple
can I screech? can you screech? can he screech? can we screech? can you screech? can they screech?
Forme en V-ing
can I be screeching? can you be screeching? can he be screeching? can we be screeching? can you be screeching? can they be screeching?
Perfect
can I have screeched? can you have screeched? can he have screeched? can we have screeched? can you have screeched? can they have screeched?
Perfect en V-ing
can I have been screeching? can you have been screeching? can he have been screeching? can we have been screeching? can you have been screeching? can they have been screeching?
Forme interro-négative
Forme simple
can I not screech? can you not screech? can he not screech? can we not screech? can you not screech? can they not screech?
Forme en V-ing
can I not be screeching? can you not be screeching? can he not be screeching? can we not be screeching? can you not be screeching? can they not be screeching?
Perfect
can I not have screeched? can you not have screeched? can he not have screeched? can we not have screeched? can you not have screeched? can they not have screeched?
Perfect en V-ing
can I not have been screeching? can you not have been screeching? can he not have been screeching? can we not have been screeching? can you not have been screeching? can they not have been screeching?