I can medicine you can medicine he can medicine we can medicine you can medicine they can medicine
V-ing form
I can be medicining you can be medicining he can be medicining we can be medicining you can be medicining they can be medicining
Perfect
I can have medicined you can have medicined he can have medicined we can have medicined you can have medicined they can have medicined
V-ing perfect
I can have been medicining you can have been medicining he can have been medicining we can have been medicining you can have been medicining they can have been medicining
Negation
Simple form
I can't medicine you can't medicine he can't medicine we can't medicine you can't medicine they can't medicine
V-ing form
I can't be medicining you can't be medicining he can't be medicining we can't be medicining you can't be medicining they can't be medicining
Perfect
I can't have medicined you can't have medicined he can't have medicined we can't have medicined you can't have medicined they can't have medicined
V-ing perfect
I can't have been medicining you can't have been medicining he can't have been medicining we can't have been medicining you can't have been medicining they can't have been medicining
Interrogative form
Simple form
can I medicine? can you medicine? can he medicine? can we medicine? can you medicine? can they medicine?
V-ing form
can I be medicining? can you be medicining? can he be medicining? can we be medicining? can you be medicining? can they be medicining?
Perfect
can I have medicined? can you have medicined? can he have medicined? can we have medicined? can you have medicined? can they have medicined?
V-ing perfect
can I have been medicining? can you have been medicining? can he have been medicining? can we have been medicining? can you have been medicining? can they have been medicining?
Interro-negative form
Simple form
can't I medicine? can't you medicine? can't he medicine? can't we medicine? can't you medicine? can't they medicine?
V-ing form
can't I be medicining? can't you be medicining? can't he be medicining? can't we be medicining? can't you be medicining? can't they be medicining?
Perfect
can't I have medicined? can't you have medicined? can't he have medicined? can't we have medicined? can't you have medicined? can't they have medicined?
V-ing perfect
can't I have been medicining? can't you have been medicining? can't he have been medicining? can't we have been medicining? can't you have been medicining? can't they have been medicining?