I could bloom you could bloom he could bloom we could bloom you could bloom they could bloom
V-ing form
I could be blooming you could be blooming he could be blooming we could be blooming you could be blooming they could be blooming
Perfect
I could have bloomed you could have bloomed he 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 he 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 he 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 he 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 he 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 he 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 he bloom? could we bloom? could you bloom? could they bloom?
V-ing form
could I be blooming? could you be blooming? could he be blooming? could we be blooming? could you be blooming? could they be blooming?
Perfect
could I have bloomed? could you have bloomed? could he 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 he 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 he 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 he 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 he 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 he have been blooming? couldn't we have been blooming? couldn't you have been blooming? couldn't they have been blooming?