I can desire you can desire he can desire we can desire you can desire they can desire
V-ing form
I can be desiring you can be desiring he can be desiring we can be desiring you can be desiring they can be desiring
Perfect
I can have desired you can have desired he can have desired we can have desired you can have desired they can have desired
V-ing perfect
I can have been desiring you can have been desiring he can have been desiring we can have been desiring you can have been desiring they can have been desiring
Negation
Simple form
I can't desire you can't desire he can't desire we can't desire you can't desire they can't desire
V-ing form
I can't be desiring you can't be desiring he can't be desiring we can't be desiring you can't be desiring they can't be desiring
Perfect
I can't have desired you can't have desired he can't have desired we can't have desired you can't have desired they can't have desired
V-ing perfect
I can't have been desiring you can't have been desiring he can't have been desiring we can't have been desiring you can't have been desiring they can't have been desiring
Interrogative form
Simple form
can I desire? can you desire? can he desire? can we desire? can you desire? can they desire?
V-ing form
can I be desiring? can you be desiring? can he be desiring? can we be desiring? can you be desiring? can they be desiring?
Perfect
can I have desired? can you have desired? can he have desired? can we have desired? can you have desired? can they have desired?
V-ing perfect
can I have been desiring? can you have been desiring? can he have been desiring? can we have been desiring? can you have been desiring? can they have been desiring?
Interro-negative form
Simple form
can't I desire? can't you desire? can't he desire? can't we desire? can't you desire? can't they desire?
V-ing form
can't I be desiring? can't you be desiring? can't he be desiring? can't we be desiring? can't you be desiring? can't they be desiring?
Perfect
can't I have desired? can't you have desired? can't he have desired? can't we have desired? can't you have desired? can't they have desired?
V-ing perfect
can't I have been desiring? can't you have been desiring? can't he have been desiring? can't we have been desiring? can't you have been desiring? can't they have been desiring?