I can trail you can trail he can trail we can trail you can trail they can trail
Forme en V-ing
I can be trailing you can be trailing he can be trailing we can be trailing you can be trailing they can be trailing
Perfect
I can have trailed you can have trailed he can have trailed we can have trailed you can have trailed they can have trailed
Perfect en V-ing
I can have been trailing you can have been trailing he can have been trailing we can have been trailing you can have been trailing they can have been trailing
Négation
Forme simple
I cannot trail you cannot trail he cannot trail we cannot trail you cannot trail they cannot trail
Forme en V-ing
I cannot be trailing you cannot be trailing he cannot be trailing we cannot be trailing you cannot be trailing they cannot be trailing
Perfect
I cannot have trailed you cannot have trailed he cannot have trailed we cannot have trailed you cannot have trailed they cannot have trailed
Perfect en V-ing
I cannot have been trailing you cannot have been trailing he cannot have been trailing we cannot have been trailing you cannot have been trailing they cannot have been trailing
Forme interrogative
Forme simple
can I trail? can you trail? can he trail? can we trail? can you trail? can they trail?
Forme en V-ing
can I be trailing? can you be trailing? can he be trailing? can we be trailing? can you be trailing? can they be trailing?
Perfect
can I have trailed? can you have trailed? can he have trailed? can we have trailed? can you have trailed? can they have trailed?
Perfect en V-ing
can I have been trailing? can you have been trailing? can he have been trailing? can we have been trailing? can you have been trailing? can they have been trailing?
Forme interro-négative
Forme simple
can I not trail? can you not trail? can he not trail? can we not trail? can you not trail? can they not trail?
Forme en V-ing
can I not be trailing? can you not be trailing? can he not be trailing? can we not be trailing? can you not be trailing? can they not be trailing?
Perfect
can I not have trailed? can you not have trailed? can he not have trailed? can we not have trailed? can you not have trailed? can they not have trailed?
Perfect en V-ing
can I not have been trailing? can you not have been trailing? can he not have been trailing? can we not have been trailing? can you not have been trailing? can they not have been trailing?