I can detect you can detect she can detect we can detect you can detect they can detect
V-ing form
I can be detecting you can be detecting she can be detecting we can be detecting you can be detecting they can be detecting
Perfect
I can have detected you can have detected she can have detected we can have detected you can have detected they can have detected
V-ing perfect
I can have been detecting you can have been detecting she can have been detecting we can have been detecting you can have been detecting they can have been detecting
Negation
Simple form
I can't detect you can't detect she can't detect we can't detect you can't detect they can't detect
V-ing form
I can't be detecting you can't be detecting she can't be detecting we can't be detecting you can't be detecting they can't be detecting
Perfect
I can't have detected you can't have detected she can't have detected we can't have detected you can't have detected they can't have detected
V-ing perfect
I can't have been detecting you can't have been detecting she can't have been detecting we can't have been detecting you can't have been detecting they can't have been detecting
Interrogative form
Simple form
can I detect? can you detect? can she detect? can we detect? can you detect? can they detect?
V-ing form
can I be detecting? can you be detecting? can she be detecting? can we be detecting? can you be detecting? can they be detecting?
Perfect
can I have detected? can you have detected? can she have detected? can we have detected? can you have detected? can they have detected?
V-ing perfect
can I have been detecting? can you have been detecting? can she have been detecting? can we have been detecting? can you have been detecting? can they have been detecting?
Interro-negative form
Simple form
can't I detect? can't you detect? can't she detect? can't we detect? can't you detect? can't they detect?
V-ing form
can't I be detecting? can't you be detecting? can't she be detecting? can't we be detecting? can't you be detecting? can't they be detecting?
Perfect
can't I have detected? can't you have detected? can't she have detected? can't we have detected? can't you have detected? can't they have detected?
V-ing perfect
can't I have been detecting? can't you have been detecting? can't she have been detecting? can't we have been detecting? can't you have been detecting? can't they have been detecting?