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 cannot collar you cannot collar she cannot collar we cannot collar you cannot collar they cannot collar
V-ing form
I cannot be collaring you cannot be collaring she cannot be collaring we cannot be collaring you cannot be collaring they cannot be collaring
Perfect
I cannot have collared you cannot have collared she cannot have collared we cannot have collared you cannot have collared they cannot have collared
V-ing perfect
I cannot have been collaring you cannot have been collaring she cannot have been collaring we cannot have been collaring you cannot have been collaring they cannot 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 I not collar? can you not collar? can she not collar? can we not collar? can you not collar? can they not collar?
V-ing form
can I not be collaring? can you not be collaring? can she not be collaring? can we not be collaring? can you not be collaring? can they not be collaring?
Perfect
can I not have collared? can you not have collared? can she not have collared? can we not have collared? can you not have collared? can they not have collared?
V-ing perfect
can I not have been collaring? can you not have been collaring? can she not have been collaring? can we not have been collaring? can you not have been collaring? can they not have been collaring?