I can collar you can collar she can collar we can collar you can collar they can collar
V-ing form
I can be collaring you can be collaring she can be collaring we can be collaring you can be collaring they can be collaring
Perfect
I can have collared you can have collared she can have collared we can have collared you can have collared they can have collared
V-ing perfect
I can have been collaring you can have been collaring she can have been collaring we can have been collaring you can have been collaring they can have been collaring
Negation
Simple form
I can't collar you can't collar she can't collar we can't collar you can't collar they can't collar
V-ing form
I can't be collaring you can't be collaring she can't be collaring we can't be collaring you can't be collaring they can't be collaring
Perfect
I can't have collared you can't have collared she can't have collared we can't have collared you can't have collared they can't have collared
V-ing perfect
I can't have been collaring you can't have been collaring she can't have been collaring we can't have been collaring you can't have been collaring they can't have been collaring
Interrogative form
Simple form
can I collar? can you collar? can she collar? can we collar? can you collar? can they collar?
V-ing form
can I be collaring? can you be collaring? can she be collaring? can we be collaring? can you be collaring? can they be collaring?
Perfect
can I have collared? can you have collared? can she have collared? can we have collared? can you have collared? can they have collared?
V-ing perfect
can I have been collaring? can you have been collaring? can she have been collaring? can we have been collaring? can you have been collaring? can they have been collaring?
Interro-negative form
Simple form
can't I collar? can't you collar? can't she collar? can't we collar? can't you collar? can't they collar?
V-ing form
can't I be collaring? can't you be collaring? can't she be collaring? can't we be collaring? can't you be collaring? can't they be collaring?
Perfect
can't I have collared? can't you have collared? can't she have collared? can't we have collared? can't you have collared? can't they have collared?
V-ing perfect
can't I have been collaring? can't you have been collaring? can't she have been collaring? can't we have been collaring? can't you have been collaring? can't they have been collaring?