I can assume you can assume he can assume we can assume you can assume they can assume
V-ing form
I can be assuming you can be assuming he can be assuming we can be assuming you can be assuming they can be assuming
Perfect
I can have assumed you can have assumed he can have assumed we can have assumed you can have assumed they can have assumed
V-ing perfect
I can have been assuming you can have been assuming he can have been assuming we can have been assuming you can have been assuming they can have been assuming
Negation
Simple form
I can't assume you can't assume he can't assume we can't assume you can't assume they can't assume
V-ing form
I can't be assuming you can't be assuming he can't be assuming we can't be assuming you can't be assuming they can't be assuming
Perfect
I can't have assumed you can't have assumed he can't have assumed we can't have assumed you can't have assumed they can't have assumed
V-ing perfect
I can't have been assuming you can't have been assuming he can't have been assuming we can't have been assuming you can't have been assuming they can't have been assuming
Interrogative form
Simple form
can I assume? can you assume? can he assume? can we assume? can you assume? can they assume?
V-ing form
can I be assuming? can you be assuming? can he be assuming? can we be assuming? can you be assuming? can they be assuming?
Perfect
can I have assumed? can you have assumed? can he have assumed? can we have assumed? can you have assumed? can they have assumed?
V-ing perfect
can I have been assuming? can you have been assuming? can he have been assuming? can we have been assuming? can you have been assuming? can they have been assuming?
Interro-negative form
Simple form
can't I assume? can't you assume? can't he assume? can't we assume? can't you assume? can't they assume?
V-ing form
can't I be assuming? can't you be assuming? can't he be assuming? can't we be assuming? can't you be assuming? can't they be assuming?
Perfect
can't I have assumed? can't you have assumed? can't he have assumed? can't we have assumed? can't you have assumed? can't they have assumed?
V-ing perfect
can't I have been assuming? can't you have been assuming? can't he have been assuming? can't we have been assuming? can't you have been assuming? can't they have been assuming?