I could detect you could detect he could detect we could detect you could detect they could detect
Forme en V-ing
I could be detecting you could be detecting he could be detecting we could be detecting you could be detecting they could be detecting
Perfect
I could have detected you could have detected he could have detected we could have detected you could have detected they could have detected
Perfect en V-ing
I could have been detecting you could have been detecting he could have been detecting we could have been detecting you could have been detecting they could have been detecting
Négation
Forme simple
I couldn't detect you couldn't detect he couldn't detect we couldn't detect you couldn't detect they couldn't detect
Forme en V-ing
I couldn't be detecting you couldn't be detecting he couldn't be detecting we couldn't be detecting you couldn't be detecting they couldn't be detecting
Perfect
I couldn't have detected you couldn't have detected he couldn't have detected we couldn't have detected you couldn't have detected they couldn't have detected
Perfect en V-ing
I couldn't have been detecting you couldn't have been detecting he couldn't have been detecting we couldn't have been detecting you couldn't have been detecting they couldn't have been detecting
Forme interrogative
Forme simple
could I detect? could you detect? could he detect? could we detect? could you detect? could they detect?
Forme en V-ing
could I be detecting? could you be detecting? could he be detecting? could we be detecting? could you be detecting? could they be detecting?
Perfect
could I have detected? could you have detected? could he have detected? could we have detected? could you have detected? could they have detected?
Perfect en V-ing
could I have been detecting? could you have been detecting? could he have been detecting? could we have been detecting? could you have been detecting? could they have been detecting?
Forme interro-négative
Forme simple
couldn't I detect? couldn't you detect? couldn't he detect? couldn't we detect? couldn't you detect? couldn't they detect?
Forme en V-ing
couldn't I be detecting? couldn't you be detecting? couldn't he be detecting? couldn't we be detecting? couldn't you be detecting? couldn't they be detecting?
Perfect
couldn't I have detected? couldn't you have detected? couldn't he have detected? couldn't we have detected? couldn't you have detected? couldn't they have detected?
Perfect en V-ing
couldn't I have been detecting? couldn't you have been detecting? couldn't he have been detecting? couldn't we have been detecting? couldn't you have been detecting? couldn't they have been detecting?