English verb conjugation
CAN CONCAVE

Regular verb: concave - concaved - concaved

Affirmation

Simple form	V-ing form
I can concave you can concave she can concave we can concave you can concave they can concave	I can be concaving you can be concaving she can be concaving we can be concaving you can be concaving they can be concaving
Perfect	V-ing perfect
I can have concaved you can have concaved she can have concaved we can have concaved you can have concaved they can have concaved	I can have been concaving you can have been concaving she can have been concaving we can have been concaving you can have been concaving they can have been concaving

Negation

Simple form	V-ing form
I cannot concave you cannot concave she cannot concave we cannot concave you cannot concave they cannot concave	I cannot be concaving you cannot be concaving she cannot be concaving we cannot be concaving you cannot be concaving they cannot be concaving
Perfect	V-ing perfect
I cannot have concaved you cannot have concaved she cannot have concaved we cannot have concaved you cannot have concaved they cannot have concaved	I cannot have been concaving you cannot have been concaving she cannot have been concaving we cannot have been concaving you cannot have been concaving they cannot have been concaving

Interrogative form

Simple form	V-ing form
can I concave? can you concave? can she concave? can we concave? can you concave? can they concave?	can I be concaving? can you be concaving? can she be concaving? can we be concaving? can you be concaving? can they be concaving?
Perfect	V-ing perfect
can I have concaved? can you have concaved? can she have concaved? can we have concaved? can you have concaved? can they have concaved?	can I have been concaving? can you have been concaving? can she have been concaving? can we have been concaving? can you have been concaving? can they have been concaving?

Interro-negative form

Simple form	V-ing form
can I not concave? can you not concave? can she not concave? can we not concave? can you not concave? can they not concave?	can I not be concaving? can you not be concaving? can she not be concaving? can we not be concaving? can you not be concaving? can they not be concaving?
Perfect	V-ing perfect
can I not have concaved? can you not have concaved? can she not have concaved? can we not have concaved? can you not have concaved? can they not have concaved?	can I not have been concaving? can you not have been concaving? can she not have been concaving? can we not have been concaving? can you not have been concaving? can they not have been concaving?