I can stimulate you can stimulate he can stimulate we can stimulate you can stimulate they can stimulate
V-ing form
I can be stimulating you can be stimulating he can be stimulating we can be stimulating you can be stimulating they can be stimulating
Perfect
I can have stimulated you can have stimulated he can have stimulated we can have stimulated you can have stimulated they can have stimulated
V-ing perfect
I can have been stimulating you can have been stimulating he can have been stimulating we can have been stimulating you can have been stimulating they can have been stimulating
Negation
Simple form
I can't stimulate you can't stimulate he can't stimulate we can't stimulate you can't stimulate they can't stimulate
V-ing form
I can't be stimulating you can't be stimulating he can't be stimulating we can't be stimulating you can't be stimulating they can't be stimulating
Perfect
I can't have stimulated you can't have stimulated he can't have stimulated we can't have stimulated you can't have stimulated they can't have stimulated
V-ing perfect
I can't have been stimulating you can't have been stimulating he can't have been stimulating we can't have been stimulating you can't have been stimulating they can't have been stimulating
Interrogative form
Simple form
can I stimulate? can you stimulate? can he stimulate? can we stimulate? can you stimulate? can they stimulate?
V-ing form
can I be stimulating? can you be stimulating? can he be stimulating? can we be stimulating? can you be stimulating? can they be stimulating?
Perfect
can I have stimulated? can you have stimulated? can he have stimulated? can we have stimulated? can you have stimulated? can they have stimulated?
V-ing perfect
can I have been stimulating? can you have been stimulating? can he have been stimulating? can we have been stimulating? can you have been stimulating? can they have been stimulating?
Interro-negative form
Simple form
can't I stimulate? can't you stimulate? can't he stimulate? can't we stimulate? can't you stimulate? can't they stimulate?
V-ing form
can't I be stimulating? can't you be stimulating? can't he be stimulating? can't we be stimulating? can't you be stimulating? can't they be stimulating?
Perfect
can't I have stimulated? can't you have stimulated? can't he have stimulated? can't we have stimulated? can't you have stimulated? can't they have stimulated?
V-ing perfect
can't I have been stimulating? can't you have been stimulating? can't he have been stimulating? can't we have been stimulating? can't you have been stimulating? can't they have been stimulating?