I can catechize you can catechize he can catechize we can catechize you can catechize they can catechize
V-ing form
I can be catechizing you can be catechizing he can be catechizing we can be catechizing you can be catechizing they can be catechizing
Perfect
I can have catechized you can have catechized he can have catechized we can have catechized you can have catechized they can have catechized
V-ing perfect
I can have been catechizing you can have been catechizing he can have been catechizing we can have been catechizing you can have been catechizing they can have been catechizing
Negation
Simple form
I can't catechize you can't catechize he can't catechize we can't catechize you can't catechize they can't catechize
V-ing form
I can't be catechizing you can't be catechizing he can't be catechizing we can't be catechizing you can't be catechizing they can't be catechizing
Perfect
I can't have catechized you can't have catechized he can't have catechized we can't have catechized you can't have catechized they can't have catechized
V-ing perfect
I can't have been catechizing you can't have been catechizing he can't have been catechizing we can't have been catechizing you can't have been catechizing they can't have been catechizing
Interrogative form
Simple form
can I catechize? can you catechize? can he catechize? can we catechize? can you catechize? can they catechize?
V-ing form
can I be catechizing? can you be catechizing? can he be catechizing? can we be catechizing? can you be catechizing? can they be catechizing?
Perfect
can I have catechized? can you have catechized? can he have catechized? can we have catechized? can you have catechized? can they have catechized?
V-ing perfect
can I have been catechizing? can you have been catechizing? can he have been catechizing? can we have been catechizing? can you have been catechizing? can they have been catechizing?
Interro-negative form
Simple form
can't I catechize? can't you catechize? can't he catechize? can't we catechize? can't you catechize? can't they catechize?
V-ing form
can't I be catechizing? can't you be catechizing? can't he be catechizing? can't we be catechizing? can't you be catechizing? can't they be catechizing?
Perfect
can't I have catechized? can't you have catechized? can't he have catechized? can't we have catechized? can't you have catechized? can't they have catechized?
V-ing perfect
can't I have been catechizing? can't you have been catechizing? can't he have been catechizing? can't we have been catechizing? can't you have been catechizing? can't they have been catechizing?