I can calendar you can calendar she can calendar we can calendar you can calendar they can calendar
V-ing form
I can be calendaring you can be calendaring she can be calendaring we can be calendaring you can be calendaring they can be calendaring
Perfect
I can have calendared you can have calendared she can have calendared we can have calendared you can have calendared they can have calendared
V-ing perfect
I can have been calendaring you can have been calendaring she can have been calendaring we can have been calendaring you can have been calendaring they can have been calendaring
Negation
Simple form
I can't calendar you can't calendar she can't calendar we can't calendar you can't calendar they can't calendar
V-ing form
I can't be calendaring you can't be calendaring she can't be calendaring we can't be calendaring you can't be calendaring they can't be calendaring
Perfect
I can't have calendared you can't have calendared she can't have calendared we can't have calendared you can't have calendared they can't have calendared
V-ing perfect
I can't have been calendaring you can't have been calendaring she can't have been calendaring we can't have been calendaring you can't have been calendaring they can't have been calendaring
Interrogative form
Simple form
can I calendar? can you calendar? can she calendar? can we calendar? can you calendar? can they calendar?
V-ing form
can I be calendaring? can you be calendaring? can she be calendaring? can we be calendaring? can you be calendaring? can they be calendaring?
Perfect
can I have calendared? can you have calendared? can she have calendared? can we have calendared? can you have calendared? can they have calendared?
V-ing perfect
can I have been calendaring? can you have been calendaring? can she have been calendaring? can we have been calendaring? can you have been calendaring? can they have been calendaring?
Interro-negative form
Simple form
can't I calendar? can't you calendar? can't she calendar? can't we calendar? can't you calendar? can't they calendar?
V-ing form
can't I be calendaring? can't you be calendaring? can't she be calendaring? can't we be calendaring? can't you be calendaring? can't they be calendaring?
Perfect
can't I have calendared? can't you have calendared? can't she have calendared? can't we have calendared? can't you have calendared? can't they have calendared?
V-ing perfect
can't I have been calendaring? can't you have been calendaring? can't she have been calendaring? can't we have been calendaring? can't you have been calendaring? can't they have been calendaring?