English verb conjugation
COULD CHELATE

Regular verb: chelate - chelated - chelated

Affirmation

Simple form	V-ing form
I could chelate you could chelate he could chelate we could chelate you could chelate they could chelate	I could be chelating you could be chelating he could be chelating we could be chelating you could be chelating they could be chelating
Perfect	V-ing perfect
I could have chelated you could have chelated he could have chelated we could have chelated you could have chelated they could have chelated	I could have been chelating you could have been chelating he could have been chelating we could have been chelating you could have been chelating they could have been chelating

Negation

Simple form	V-ing form
I couldn't chelate you couldn't chelate he couldn't chelate we couldn't chelate you couldn't chelate they couldn't chelate	I couldn't be chelating you couldn't be chelating he couldn't be chelating we couldn't be chelating you couldn't be chelating they couldn't be chelating
Perfect	V-ing perfect
I couldn't have chelated you couldn't have chelated he couldn't have chelated we couldn't have chelated you couldn't have chelated they couldn't have chelated	I couldn't have been chelating you couldn't have been chelating he couldn't have been chelating we couldn't have been chelating you couldn't have been chelating they couldn't have been chelating

Interrogative form

Simple form	V-ing form
could I chelate? could you chelate? could he chelate? could we chelate? could you chelate? could they chelate?	could I be chelating? could you be chelating? could he be chelating? could we be chelating? could you be chelating? could they be chelating?
Perfect	V-ing perfect
could I have chelated? could you have chelated? could he have chelated? could we have chelated? could you have chelated? could they have chelated?	could I have been chelating? could you have been chelating? could he have been chelating? could we have been chelating? could you have been chelating? could they have been chelating?

Interro-negative form

Simple form	V-ing form
couldn't I chelate? couldn't you chelate? couldn't he chelate? couldn't we chelate? couldn't you chelate? couldn't they chelate?	couldn't I be chelating? couldn't you be chelating? couldn't he be chelating? couldn't we be chelating? couldn't you be chelating? couldn't they be chelating?
Perfect	V-ing perfect
couldn't I have chelated? couldn't you have chelated? couldn't he have chelated? couldn't we have chelated? couldn't you have chelated? couldn't they have chelated?	couldn't I have been chelating? couldn't you have been chelating? couldn't he have been chelating? couldn't we have been chelating? couldn't you have been chelating? couldn't they have been chelating?