English verb conjugation
COULD CONVALESCE

Regular verb: convalesce - convalesced - convalesced

Affirmation

Simple form	V-ing form
I could convalesce you could convalesce he could convalesce we could convalesce you could convalesce they could convalesce	I could be convalescing you could be convalescing he could be convalescing we could be convalescing you could be convalescing they could be convalescing
Perfect	V-ing perfect
I could have convalesced you could have convalesced he could have convalesced we could have convalesced you could have convalesced they could have convalesced	I could have been convalescing you could have been convalescing he could have been convalescing we could have been convalescing you could have been convalescing they could have been convalescing

Negation

Simple form	V-ing form
I couldn't convalesce you couldn't convalesce he couldn't convalesce we couldn't convalesce you couldn't convalesce they couldn't convalesce	I couldn't be convalescing you couldn't be convalescing he couldn't be convalescing we couldn't be convalescing you couldn't be convalescing they couldn't be convalescing
Perfect	V-ing perfect
I couldn't have convalesced you couldn't have convalesced he couldn't have convalesced we couldn't have convalesced you couldn't have convalesced they couldn't have convalesced	I couldn't have been convalescing you couldn't have been convalescing he couldn't have been convalescing we couldn't have been convalescing you couldn't have been convalescing they couldn't have been convalescing

Interrogative form

Simple form	V-ing form
could I convalesce? could you convalesce? could he convalesce? could we convalesce? could you convalesce? could they convalesce?	could I be convalescing? could you be convalescing? could he be convalescing? could we be convalescing? could you be convalescing? could they be convalescing?
Perfect	V-ing perfect
could I have convalesced? could you have convalesced? could he have convalesced? could we have convalesced? could you have convalesced? could they have convalesced?	could I have been convalescing? could you have been convalescing? could he have been convalescing? could we have been convalescing? could you have been convalescing? could they have been convalescing?

Interro-negative form

Simple form	V-ing form
couldn't I convalesce? couldn't you convalesce? couldn't he convalesce? couldn't we convalesce? couldn't you convalesce? couldn't they convalesce?	couldn't I be convalescing? couldn't you be convalescing? couldn't he be convalescing? couldn't we be convalescing? couldn't you be convalescing? couldn't they be convalescing?
Perfect	V-ing perfect
couldn't I have convalesced? couldn't you have convalesced? couldn't he have convalesced? couldn't we have convalesced? couldn't you have convalesced? couldn't they have convalesced?	couldn't I have been convalescing? couldn't you have been convalescing? couldn't he have been convalescing? couldn't we have been convalescing? couldn't you have been convalescing? couldn't they have been convalescing?