I can assent you can assent he can assent we can assent you can assent they can assent
V-ing form
I can be assenting you can be assenting he can be assenting we can be assenting you can be assenting they can be assenting
Perfect
I can have assented you can have assented he can have assented we can have assented you can have assented they can have assented
V-ing perfect
I can have been assenting you can have been assenting he can have been assenting we can have been assenting you can have been assenting they can have been assenting
Negation
Simple form
I can't assent you can't assent he can't assent we can't assent you can't assent they can't assent
V-ing form
I can't be assenting you can't be assenting he can't be assenting we can't be assenting you can't be assenting they can't be assenting
Perfect
I can't have assented you can't have assented he can't have assented we can't have assented you can't have assented they can't have assented
V-ing perfect
I can't have been assenting you can't have been assenting he can't have been assenting we can't have been assenting you can't have been assenting they can't have been assenting
Interrogative form
Simple form
can I assent? can you assent? can he assent? can we assent? can you assent? can they assent?
V-ing form
can I be assenting? can you be assenting? can he be assenting? can we be assenting? can you be assenting? can they be assenting?
Perfect
can I have assented? can you have assented? can he have assented? can we have assented? can you have assented? can they have assented?
V-ing perfect
can I have been assenting? can you have been assenting? can he have been assenting? can we have been assenting? can you have been assenting? can they have been assenting?
Interro-negative form
Simple form
can't I assent? can't you assent? can't he assent? can't we assent? can't you assent? can't they assent?
V-ing form
can't I be assenting? can't you be assenting? can't he be assenting? can't we be assenting? can't you be assenting? can't they be assenting?
Perfect
can't I have assented? can't you have assented? can't he have assented? can't we have assented? can't you have assented? can't they have assented?
V-ing perfect
can't I have been assenting? can't you have been assenting? can't he have been assenting? can't we have been assenting? can't you have been assenting? can't they have been assenting?