I could compose you could compose he could compose we could compose you could compose they could compose
V-ing form
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Perfect
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V-ing perfect
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Negation
Simple form
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V-ing form
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Perfect
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V-ing perfect
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Interrogative form
Simple form
could I compose? could you compose? could he compose? could we compose? could you compose? could they compose?
V-ing form
could I be composing? could you be composing? could he be composing? could we be composing? could you be composing? could they be composing?
Perfect
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V-ing perfect
could I have been composing? could you have been composing? could he have been composing? could we have been composing? could you have been composing? could they have been composing?
Interro-negative form
Simple form
could I not compose? could you not compose? could he not compose? could we not compose? could you not compose? could they not compose?
V-ing form
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Perfect
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V-ing perfect
could I not have been composing? could you not have been composing? could he not have been composing? could we not have been composing? could you not have been composing? could they not have been composing?