English verb conjugation
COULD TESSELLATE

Regular verb: tessellate - tessellated - tessellated

Affirmation

Simple form	V-ing form
I could tessellate you could tessellate he could tessellate we could tessellate you could tessellate they could tessellate	I could be tessellating you could be tessellating he could be tessellating we could be tessellating you could be tessellating they could be tessellating
Perfect	V-ing perfect
I could have tessellated you could have tessellated he could have tessellated we could have tessellated you could have tessellated they could have tessellated	I could have been tessellating you could have been tessellating he could have been tessellating we could have been tessellating you could have been tessellating they could have been tessellating

Negation

Simple form	V-ing form
I could not tessellate you could not tessellate he could not tessellate we could not tessellate you could not tessellate they could not tessellate	I could not be tessellating you could not be tessellating he could not be tessellating we could not be tessellating you could not be tessellating they could not be tessellating
Perfect	V-ing perfect
I could not have tessellated you could not have tessellated he could not have tessellated we could not have tessellated you could not have tessellated they could not have tessellated	I could not have been tessellating you could not have been tessellating he could not have been tessellating we could not have been tessellating you could not have been tessellating they could not have been tessellating

Interrogative form

Simple form	V-ing form
could I tessellate? could you tessellate? could he tessellate? could we tessellate? could you tessellate? could they tessellate?	could I be tessellating? could you be tessellating? could he be tessellating? could we be tessellating? could you be tessellating? could they be tessellating?
Perfect	V-ing perfect
could I have tessellated? could you have tessellated? could he have tessellated? could we have tessellated? could you have tessellated? could they have tessellated?	could I have been tessellating? could you have been tessellating? could he have been tessellating? could we have been tessellating? could you have been tessellating? could they have been tessellating?

Interro-negative form

Simple form	V-ing form
could I not tessellate? could you not tessellate? could he not tessellate? could we not tessellate? could you not tessellate? could they not tessellate?	could I not be tessellating? could you not be tessellating? could he not be tessellating? could we not be tessellating? could you not be tessellating? could they not be tessellating?
Perfect	V-ing perfect
could I not have tessellated? could you not have tessellated? could he not have tessellated? could we not have tessellated? could you not have tessellated? could they not have tessellated?	could I not have been tessellating? could you not have been tessellating? could he not have been tessellating? could we not have been tessellating? could you not have been tessellating? could they not have been tessellating?