I can tense you can tense he can tense we can tense you can tense they can tense
V-ing form
I can be tensing you can be tensing he can be tensing we can be tensing you can be tensing they can be tensing
Perfect
I can have tensed you can have tensed he can have tensed we can have tensed you can have tensed they can have tensed
V-ing perfect
I can have been tensing you can have been tensing he can have been tensing we can have been tensing you can have been tensing they can have been tensing
Negation
Simple form
I can't tense you can't tense he can't tense we can't tense you can't tense they can't tense
V-ing form
I can't be tensing you can't be tensing he can't be tensing we can't be tensing you can't be tensing they can't be tensing
Perfect
I can't have tensed you can't have tensed he can't have tensed we can't have tensed you can't have tensed they can't have tensed
V-ing perfect
I can't have been tensing you can't have been tensing he can't have been tensing we can't have been tensing you can't have been tensing they can't have been tensing
Interrogative form
Simple form
can I tense? can you tense? can he tense? can we tense? can you tense? can they tense?
V-ing form
can I be tensing? can you be tensing? can he be tensing? can we be tensing? can you be tensing? can they be tensing?
Perfect
can I have tensed? can you have tensed? can he have tensed? can we have tensed? can you have tensed? can they have tensed?
V-ing perfect
can I have been tensing? can you have been tensing? can he have been tensing? can we have been tensing? can you have been tensing? can they have been tensing?
Interro-negative form
Simple form
can't I tense? can't you tense? can't he tense? can't we tense? can't you tense? can't they tense?
V-ing form
can't I be tensing? can't you be tensing? can't he be tensing? can't we be tensing? can't you be tensing? can't they be tensing?
Perfect
can't I have tensed? can't you have tensed? can't he have tensed? can't we have tensed? can't you have tensed? can't they have tensed?
V-ing perfect
can't I have been tensing? can't you have been tensing? can't he have been tensing? can't we have been tensing? can't you have been tensing? can't they have been tensing?