I can plant you can plant he can plant we can plant you can plant they can plant
V-ing form
I can be planting you can be planting he can be planting we can be planting you can be planting they can be planting
Perfect
I can have planted you can have planted he can have planted we can have planted you can have planted they can have planted
V-ing perfect
I can have been planting you can have been planting he can have been planting we can have been planting you can have been planting they can have been planting
Negation
Simple form
I can't plant you can't plant he can't plant we can't plant you can't plant they can't plant
V-ing form
I can't be planting you can't be planting he can't be planting we can't be planting you can't be planting they can't be planting
Perfect
I can't have planted you can't have planted he can't have planted we can't have planted you can't have planted they can't have planted
V-ing perfect
I can't have been planting you can't have been planting he can't have been planting we can't have been planting you can't have been planting they can't have been planting
Interrogative form
Simple form
can I plant? can you plant? can he plant? can we plant? can you plant? can they plant?
V-ing form
can I be planting? can you be planting? can he be planting? can we be planting? can you be planting? can they be planting?
Perfect
can I have planted? can you have planted? can he have planted? can we have planted? can you have planted? can they have planted?
V-ing perfect
can I have been planting? can you have been planting? can he have been planting? can we have been planting? can you have been planting? can they have been planting?
Interro-negative form
Simple form
can't I plant? can't you plant? can't he plant? can't we plant? can't you plant? can't they plant?
V-ing form
can't I be planting? can't you be planting? can't he be planting? can't we be planting? can't you be planting? can't they be planting?
Perfect
can't I have planted? can't you have planted? can't he have planted? can't we have planted? can't you have planted? can't they have planted?
V-ing perfect
can't I have been planting? can't you have been planting? can't he have been planting? can't we have been planting? can't you have been planting? can't they have been planting?