English verb conjugation
COULD COMPOST

Regular verb: compost - composted - composted

Affirmation

Simple form	V-ing form
I could compost you could compost he could compost we could compost you could compost they could compost	I could be composting you could be composting he could be composting we could be composting you could be composting they could be composting
Perfect	V-ing perfect
I could have composted you could have composted he could have composted we could have composted you could have composted they could have composted	I could have been composting you could have been composting he could have been composting we could have been composting you could have been composting they could have been composting

Negation

Simple form	V-ing form
I couldn't compost you couldn't compost he couldn't compost we couldn't compost you couldn't compost they couldn't compost	I couldn't be composting you couldn't be composting he couldn't be composting we couldn't be composting you couldn't be composting they couldn't be composting
Perfect	V-ing perfect
I couldn't have composted you couldn't have composted he couldn't have composted we couldn't have composted you couldn't have composted they couldn't have composted	I couldn't have been composting you couldn't have been composting he couldn't have been composting we couldn't have been composting you couldn't have been composting they couldn't have been composting

Interrogative form

Simple form	V-ing form
could I compost? could you compost? could he compost? could we compost? could you compost? could they compost?	could I be composting? could you be composting? could he be composting? could we be composting? could you be composting? could they be composting?
Perfect	V-ing perfect
could I have composted? could you have composted? could he have composted? could we have composted? could you have composted? could they have composted?	could I have been composting? could you have been composting? could he have been composting? could we have been composting? could you have been composting? could they have been composting?

Interro-negative form

Simple form	V-ing form
couldn't I compost? couldn't you compost? couldn't he compost? couldn't we compost? couldn't you compost? couldn't they compost?	couldn't I be composting? couldn't you be composting? couldn't he be composting? couldn't we be composting? couldn't you be composting? couldn't they be composting?
Perfect	V-ing perfect
couldn't I have composted? couldn't you have composted? couldn't he have composted? couldn't we have composted? couldn't you have composted? couldn't they have composted?	couldn't I have been composting? couldn't you have been composting? couldn't he have been composting? couldn't we have been composting? couldn't you have been composting? couldn't they have been composting?