I can constipate you can constipate he can constipate we can constipate you can constipate they can constipate
V-ing form
I can be constipating you can be constipating he can be constipating we can be constipating you can be constipating they can be constipating
Perfect
I can have constipated you can have constipated he can have constipated we can have constipated you can have constipated they can have constipated
V-ing perfect
I can have been constipating you can have been constipating he can have been constipating we can have been constipating you can have been constipating they can have been constipating
Negation
Simple form
I can't constipate you can't constipate he can't constipate we can't constipate you can't constipate they can't constipate
V-ing form
I can't be constipating you can't be constipating he can't be constipating we can't be constipating you can't be constipating they can't be constipating
Perfect
I can't have constipated you can't have constipated he can't have constipated we can't have constipated you can't have constipated they can't have constipated
V-ing perfect
I can't have been constipating you can't have been constipating he can't have been constipating we can't have been constipating you can't have been constipating they can't have been constipating
Interrogative form
Simple form
can I constipate? can you constipate? can he constipate? can we constipate? can you constipate? can they constipate?
V-ing form
can I be constipating? can you be constipating? can he be constipating? can we be constipating? can you be constipating? can they be constipating?
Perfect
can I have constipated? can you have constipated? can he have constipated? can we have constipated? can you have constipated? can they have constipated?
V-ing perfect
can I have been constipating? can you have been constipating? can he have been constipating? can we have been constipating? can you have been constipating? can they have been constipating?
Interro-negative form
Simple form
can't I constipate? can't you constipate? can't he constipate? can't we constipate? can't you constipate? can't they constipate?
V-ing form
can't I be constipating? can't you be constipating? can't he be constipating? can't we be constipating? can't you be constipating? can't they be constipating?
Perfect
can't I have constipated? can't you have constipated? can't he have constipated? can't we have constipated? can't you have constipated? can't they have constipated?
V-ing perfect
can't I have been constipating? can't you have been constipating? can't he have been constipating? can't we have been constipating? can't you have been constipating? can't they have been constipating?