I could bloom you could bloom she could bloom we could bloom you could bloom they could bloom
V-ing form
I could be blooming you could be blooming she could be blooming we could be blooming you could be blooming they could be blooming
Perfect
I could have bloomed you could have bloomed she could have bloomed we could have bloomed you could have bloomed they could have bloomed
V-ing perfect
I could have been blooming you could have been blooming she could have been blooming we could have been blooming you could have been blooming they could have been blooming
Negation
Simple form
I couldn't bloom you couldn't bloom she couldn't bloom we couldn't bloom you couldn't bloom they couldn't bloom
V-ing form
I couldn't be blooming you couldn't be blooming she couldn't be blooming we couldn't be blooming you couldn't be blooming they couldn't be blooming
Perfect
I couldn't have bloomed you couldn't have bloomed she couldn't have bloomed we couldn't have bloomed you couldn't have bloomed they couldn't have bloomed
V-ing perfect
I couldn't have been blooming you couldn't have been blooming she couldn't have been blooming we couldn't have been blooming you couldn't have been blooming they couldn't have been blooming
Interrogative form
Simple form
could I bloom? could you bloom? could she bloom? could we bloom? could you bloom? could they bloom?
V-ing form
could I be blooming? could you be blooming? could she be blooming? could we be blooming? could you be blooming? could they be blooming?
Perfect
could I have bloomed? could you have bloomed? could she have bloomed? could we have bloomed? could you have bloomed? could they have bloomed?
V-ing perfect
could I have been blooming? could you have been blooming? could she have been blooming? could we have been blooming? could you have been blooming? could they have been blooming?
Interro-negative form
Simple form
couldn't I bloom? couldn't you bloom? couldn't she bloom? couldn't we bloom? couldn't you bloom? couldn't they bloom?
V-ing form
couldn't I be blooming? couldn't you be blooming? couldn't she be blooming? couldn't we be blooming? couldn't you be blooming? couldn't they be blooming?
Perfect
couldn't I have bloomed? couldn't you have bloomed? couldn't she have bloomed? couldn't we have bloomed? couldn't you have bloomed? couldn't they have bloomed?
V-ing perfect
couldn't I have been blooming? couldn't you have been blooming? couldn't she have been blooming? couldn't we have been blooming? couldn't you have been blooming? couldn't they have been blooming?