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 cannot stimulate you cannot stimulate he cannot stimulate we cannot stimulate you cannot stimulate they cannot stimulate
V-ing form
I cannot be stimulating you cannot be stimulating he cannot be stimulating we cannot be stimulating you cannot be stimulating they cannot be stimulating
Perfect
I cannot have stimulated you cannot have stimulated he cannot have stimulated we cannot have stimulated you cannot have stimulated they cannot have stimulated
V-ing perfect
I cannot have been stimulating you cannot have been stimulating he cannot have been stimulating we cannot have been stimulating you cannot have been stimulating they cannot 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 I not stimulate? can you not stimulate? can he not stimulate? can we not stimulate? can you not stimulate? can they not stimulate?
V-ing form
can I not be stimulating? can you not be stimulating? can he not be stimulating? can we not be stimulating? can you not be stimulating? can they not be stimulating?
Perfect
can I not have stimulated? can you not have stimulated? can he not have stimulated? can we not have stimulated? can you not have stimulated? can they not have stimulated?
V-ing perfect
can I not have been stimulating? can you not have been stimulating? can he not have been stimulating? can we not have been stimulating? can you not have been stimulating? can they not have been stimulating?