I could align you could align he could align we could align you could align they could align
V-ing form
I could be aligning you could be aligning he could be aligning we could be aligning you could be aligning they could be aligning
Perfect
I could have aligned you could have aligned he could have aligned we could have aligned you could have aligned they could have aligned
V-ing perfect
I could have been aligning you could have been aligning he could have been aligning we could have been aligning you could have been aligning they could have been aligning
Negation
Simple form
I couldn't align you couldn't align he couldn't align we couldn't align you couldn't align they couldn't align
V-ing form
I couldn't be aligning you couldn't be aligning he couldn't be aligning we couldn't be aligning you couldn't be aligning they couldn't be aligning
Perfect
I couldn't have aligned you couldn't have aligned he couldn't have aligned we couldn't have aligned you couldn't have aligned they couldn't have aligned
V-ing perfect
I couldn't have been aligning you couldn't have been aligning he couldn't have been aligning we couldn't have been aligning you couldn't have been aligning they couldn't have been aligning
Interrogative form
Simple form
could I align? could you align? could he align? could we align? could you align? could they align?
V-ing form
could I be aligning? could you be aligning? could he be aligning? could we be aligning? could you be aligning? could they be aligning?
Perfect
could I have aligned? could you have aligned? could he have aligned? could we have aligned? could you have aligned? could they have aligned?
V-ing perfect
could I have been aligning? could you have been aligning? could he have been aligning? could we have been aligning? could you have been aligning? could they have been aligning?
Interro-negative form
Simple form
couldn't I align? couldn't you align? couldn't he align? couldn't we align? couldn't you align? couldn't they align?
V-ing form
couldn't I be aligning? couldn't you be aligning? couldn't he be aligning? couldn't we be aligning? couldn't you be aligning? couldn't they be aligning?
Perfect
couldn't I have aligned? couldn't you have aligned? couldn't he have aligned? couldn't we have aligned? couldn't you have aligned? couldn't they have aligned?
V-ing perfect
couldn't I have been aligning? couldn't you have been aligning? couldn't he have been aligning? couldn't we have been aligning? couldn't you have been aligning? couldn't they have been aligning?