I can weep you can weep he can weep we can weep you can weep they can weep
V-ing form
I can be weeping you can be weeping he can be weeping we can be weeping you can be weeping they can be weeping
Perfect
I can have wept you can have wept he can have wept we can have wept you can have wept they can have wept
V-ing perfect
I can have been weeping you can have been weeping he can have been weeping we can have been weeping you can have been weeping they can have been weeping
Negation
Simple form
I cannot weep you cannot weep he cannot weep we cannot weep you cannot weep they cannot weep
V-ing form
I cannot be weeping you cannot be weeping he cannot be weeping we cannot be weeping you cannot be weeping they cannot be weeping
Perfect
I cannot have wept you cannot have wept he cannot have wept we cannot have wept you cannot have wept they cannot have wept
V-ing perfect
I cannot have been weeping you cannot have been weeping he cannot have been weeping we cannot have been weeping you cannot have been weeping they cannot have been weeping
Interrogative form
Simple form
can I weep? can you weep? can he weep? can we weep? can you weep? can they weep?
V-ing form
can I be weeping? can you be weeping? can he be weeping? can we be weeping? can you be weeping? can they be weeping?
Perfect
can I have wept? can you have wept? can he have wept? can we have wept? can you have wept? can they have wept?
V-ing perfect
can I have been weeping? can you have been weeping? can he have been weeping? can we have been weeping? can you have been weeping? can they have been weeping?
Interro-negative form
Simple form
can I not weep? can you not weep? can he not weep? can we not weep? can you not weep? can they not weep?
V-ing form
can I not be weeping? can you not be weeping? can he not be weeping? can we not be weeping? can you not be weeping? can they not be weeping?
Perfect
can I not have wept? can you not have wept? can he not have wept? can we not have wept? can you not have wept? can they not have wept?
V-ing perfect
can I not have been weeping? can you not have been weeping? can he not have been weeping? can we not have been weeping? can you not have been weeping? can they not have been weeping?