English verb conjugation
COULD NUCLEATE

Regular verb: nucleate - nucleated - nucleated

Affirmation

Simple form	V-ing form
I could nucleate you could nucleate he could nucleate we could nucleate you could nucleate they could nucleate	I could be nucleating you could be nucleating he could be nucleating we could be nucleating you could be nucleating they could be nucleating
Perfect	V-ing perfect
I could have nucleated you could have nucleated he could have nucleated we could have nucleated you could have nucleated they could have nucleated	I could have been nucleating you could have been nucleating he could have been nucleating we could have been nucleating you could have been nucleating they could have been nucleating

Negation

Simple form	V-ing form
I couldn't nucleate you couldn't nucleate he couldn't nucleate we couldn't nucleate you couldn't nucleate they couldn't nucleate	I couldn't be nucleating you couldn't be nucleating he couldn't be nucleating we couldn't be nucleating you couldn't be nucleating they couldn't be nucleating
Perfect	V-ing perfect
I couldn't have nucleated you couldn't have nucleated he couldn't have nucleated we couldn't have nucleated you couldn't have nucleated they couldn't have nucleated	I couldn't have been nucleating you couldn't have been nucleating he couldn't have been nucleating we couldn't have been nucleating you couldn't have been nucleating they couldn't have been nucleating

Interrogative form

Simple form	V-ing form
could I nucleate? could you nucleate? could he nucleate? could we nucleate? could you nucleate? could they nucleate?	could I be nucleating? could you be nucleating? could he be nucleating? could we be nucleating? could you be nucleating? could they be nucleating?
Perfect	V-ing perfect
could I have nucleated? could you have nucleated? could he have nucleated? could we have nucleated? could you have nucleated? could they have nucleated?	could I have been nucleating? could you have been nucleating? could he have been nucleating? could we have been nucleating? could you have been nucleating? could they have been nucleating?

Interro-negative form

Simple form	V-ing form
couldn't I nucleate? couldn't you nucleate? couldn't he nucleate? couldn't we nucleate? couldn't you nucleate? couldn't they nucleate?	couldn't I be nucleating? couldn't you be nucleating? couldn't he be nucleating? couldn't we be nucleating? couldn't you be nucleating? couldn't they be nucleating?
Perfect	V-ing perfect
couldn't I have nucleated? couldn't you have nucleated? couldn't he have nucleated? couldn't we have nucleated? couldn't you have nucleated? couldn't they have nucleated?	couldn't I have been nucleating? couldn't you have been nucleating? couldn't he have been nucleating? couldn't we have been nucleating? couldn't you have been nucleating? couldn't they have been nucleating?