I can populate you can populate he can populate we can populate you can populate they can populate
V-ing form
I can be populating you can be populating he can be populating we can be populating you can be populating they can be populating
Perfect
I can have populated you can have populated he can have populated we can have populated you can have populated they can have populated
V-ing perfect
I can have been populating you can have been populating he can have been populating we can have been populating you can have been populating they can have been populating
Negation
Simple form
I can't populate you can't populate he can't populate we can't populate you can't populate they can't populate
V-ing form
I can't be populating you can't be populating he can't be populating we can't be populating you can't be populating they can't be populating
Perfect
I can't have populated you can't have populated he can't have populated we can't have populated you can't have populated they can't have populated
V-ing perfect
I can't have been populating you can't have been populating he can't have been populating we can't have been populating you can't have been populating they can't have been populating
Interrogative form
Simple form
can I populate? can you populate? can he populate? can we populate? can you populate? can they populate?
V-ing form
can I be populating? can you be populating? can he be populating? can we be populating? can you be populating? can they be populating?
Perfect
can I have populated? can you have populated? can he have populated? can we have populated? can you have populated? can they have populated?
V-ing perfect
can I have been populating? can you have been populating? can he have been populating? can we have been populating? can you have been populating? can they have been populating?
Interro-negative form
Simple form
can't I populate? can't you populate? can't he populate? can't we populate? can't you populate? can't they populate?
V-ing form
can't I be populating? can't you be populating? can't he be populating? can't we be populating? can't you be populating? can't they be populating?
Perfect
can't I have populated? can't you have populated? can't he have populated? can't we have populated? can't you have populated? can't they have populated?
V-ing perfect
can't I have been populating? can't you have been populating? can't he have been populating? can't we have been populating? can't you have been populating? can't they have been populating?