I could hatch you could hatch he could hatch we could hatch you could hatch they could hatch
V-ing form
I could be hatching you could be hatching he could be hatching we could be hatching you could be hatching they could be hatching
Perfect
I could have hatched you could have hatched he could have hatched we could have hatched you could have hatched they could have hatched
V-ing perfect
I could have been hatching you could have been hatching he could have been hatching we could have been hatching you could have been hatching they could have been hatching
Negation
Simple form
I couldn't hatch you couldn't hatch he couldn't hatch we couldn't hatch you couldn't hatch they couldn't hatch
V-ing form
I couldn't be hatching you couldn't be hatching he couldn't be hatching we couldn't be hatching you couldn't be hatching they couldn't be hatching
Perfect
I couldn't have hatched you couldn't have hatched he couldn't have hatched we couldn't have hatched you couldn't have hatched they couldn't have hatched
V-ing perfect
I couldn't have been hatching you couldn't have been hatching he couldn't have been hatching we couldn't have been hatching you couldn't have been hatching they couldn't have been hatching
Interrogative form
Simple form
could I hatch? could you hatch? could he hatch? could we hatch? could you hatch? could they hatch?
V-ing form
could I be hatching? could you be hatching? could he be hatching? could we be hatching? could you be hatching? could they be hatching?
Perfect
could I have hatched? could you have hatched? could he have hatched? could we have hatched? could you have hatched? could they have hatched?
V-ing perfect
could I have been hatching? could you have been hatching? could he have been hatching? could we have been hatching? could you have been hatching? could they have been hatching?
Interro-negative form
Simple form
couldn't I hatch? couldn't you hatch? couldn't he hatch? couldn't we hatch? couldn't you hatch? couldn't they hatch?
V-ing form
couldn't I be hatching? couldn't you be hatching? couldn't he be hatching? couldn't we be hatching? couldn't you be hatching? couldn't they be hatching?
Perfect
couldn't I have hatched? couldn't you have hatched? couldn't he have hatched? couldn't we have hatched? couldn't you have hatched? couldn't they have hatched?
V-ing perfect
couldn't I have been hatching? couldn't you have been hatching? couldn't he have been hatching? couldn't we have been hatching? couldn't you have been hatching? couldn't they have been hatching?