I could kneel you could kneel he could kneel we could kneel you could kneel they could kneel
V-ing form
I could be kneeling you could be kneeling he could be kneeling we could be kneeling you could be kneeling they could be kneeling
Perfect
I could have kneeled, knelt you could have kneeled, knelt he could have kneeled, knelt we could have kneeled, knelt you could have kneeled, knelt they could have kneeled, knelt
V-ing perfect
I could have been kneeling you could have been kneeling he could have been kneeling we could have been kneeling you could have been kneeling they could have been kneeling
Negation
Simple form
I couldn't kneel you couldn't kneel he couldn't kneel we couldn't kneel you couldn't kneel they couldn't kneel
V-ing form
I couldn't be kneeling you couldn't be kneeling he couldn't be kneeling we couldn't be kneeling you couldn't be kneeling they couldn't be kneeling
Perfect
I couldn't have kneeled, knelt you couldn't have kneeled, knelt he couldn't have kneeled, knelt we couldn't have kneeled, knelt you couldn't have kneeled, knelt they couldn't have kneeled, knelt
V-ing perfect
I couldn't have been kneeling you couldn't have been kneeling he couldn't have been kneeling we couldn't have been kneeling you couldn't have been kneeling they couldn't have been kneeling
Interrogative form
Simple form
could I kneel? could you kneel? could he kneel? could we kneel? could you kneel? could they kneel?
V-ing form
could I be kneeling? could you be kneeling? could he be kneeling? could we be kneeling? could you be kneeling? could they be kneeling?
Perfect
could I have kneeled, knelt? could you have kneeled, knelt? could he have kneeled, knelt? could we have kneeled, knelt? could you have kneeled, knelt? could they have kneeled, knelt?
V-ing perfect
could I have been kneeling? could you have been kneeling? could he have been kneeling? could we have been kneeling? could you have been kneeling? could they have been kneeling?
Interro-negative form
Simple form
couldn't I kneel? couldn't you kneel? couldn't he kneel? couldn't we kneel? couldn't you kneel? couldn't they kneel?
V-ing form
couldn't I be kneeling? couldn't you be kneeling? couldn't he be kneeling? couldn't we be kneeling? couldn't you be kneeling? couldn't they be kneeling?
Perfect
couldn't I have kneeled, knelt? couldn't you have kneeled, knelt? couldn't he have kneeled, knelt? couldn't we have kneeled, knelt? couldn't you have kneeled, knelt? couldn't they have kneeled, knelt?
V-ing perfect
couldn't I have been kneeling? couldn't you have been kneeling? couldn't he have been kneeling? couldn't we have been kneeling? couldn't you have been kneeling? couldn't they have been kneeling?