I could microwave you could microwave she could microwave we could microwave you could microwave they could microwave
V-ing form
I could be microwaving you could be microwaving she could be microwaving we could be microwaving you could be microwaving they could be microwaving
Perfect
I could have microwaved you could have microwaved she could have microwaved we could have microwaved you could have microwaved they could have microwaved
V-ing perfect
I could have been microwaving you could have been microwaving she could have been microwaving we could have been microwaving you could have been microwaving they could have been microwaving
Negation
Simple form
I could not microwave you could not microwave she could not microwave we could not microwave you could not microwave they could not microwave
V-ing form
I could not be microwaving you could not be microwaving she could not be microwaving we could not be microwaving you could not be microwaving they could not be microwaving
Perfect
I could not have microwaved you could not have microwaved she could not have microwaved we could not have microwaved you could not have microwaved they could not have microwaved
V-ing perfect
I could not have been microwaving you could not have been microwaving she could not have been microwaving we could not have been microwaving you could not have been microwaving they could not have been microwaving
Interrogative form
Simple form
could I microwave? could you microwave? could she microwave? could we microwave? could you microwave? could they microwave?
V-ing form
could I be microwaving? could you be microwaving? could she be microwaving? could we be microwaving? could you be microwaving? could they be microwaving?
Perfect
could I have microwaved? could you have microwaved? could she have microwaved? could we have microwaved? could you have microwaved? could they have microwaved?
V-ing perfect
could I have been microwaving? could you have been microwaving? could she have been microwaving? could we have been microwaving? could you have been microwaving? could they have been microwaving?
Interro-negative form
Simple form
could I not microwave? could you not microwave? could she not microwave? could we not microwave? could you not microwave? could they not microwave?
V-ing form
could I not be microwaving? could you not be microwaving? could she not be microwaving? could we not be microwaving? could you not be microwaving? could they not be microwaving?
Perfect
could I not have microwaved? could you not have microwaved? could she not have microwaved? could we not have microwaved? could you not have microwaved? could they not have microwaved?
V-ing perfect
could I not have been microwaving? could you not have been microwaving? could she not have been microwaving? could we not have been microwaving? could you not have been microwaving? could they not have been microwaving?