English verb conjugation
COULD HYPHENATE

Regular verb: hyphenate - hyphenated - hyphenated

Affirmation

Simple form	V-ing form
I could hyphenate you could hyphenate he could hyphenate we could hyphenate you could hyphenate they could hyphenate	I could be hyphenating you could be hyphenating he could be hyphenating we could be hyphenating you could be hyphenating they could be hyphenating
Perfect	V-ing perfect
I could have hyphenated you could have hyphenated he could have hyphenated we could have hyphenated you could have hyphenated they could have hyphenated	I could have been hyphenating you could have been hyphenating he could have been hyphenating we could have been hyphenating you could have been hyphenating they could have been hyphenating

Negation

Simple form	V-ing form
I couldn't hyphenate you couldn't hyphenate he couldn't hyphenate we couldn't hyphenate you couldn't hyphenate they couldn't hyphenate	I couldn't be hyphenating you couldn't be hyphenating he couldn't be hyphenating we couldn't be hyphenating you couldn't be hyphenating they couldn't be hyphenating
Perfect	V-ing perfect
I couldn't have hyphenated you couldn't have hyphenated he couldn't have hyphenated we couldn't have hyphenated you couldn't have hyphenated they couldn't have hyphenated	I couldn't have been hyphenating you couldn't have been hyphenating he couldn't have been hyphenating we couldn't have been hyphenating you couldn't have been hyphenating they couldn't have been hyphenating

Interrogative form

Simple form	V-ing form
could I hyphenate? could you hyphenate? could he hyphenate? could we hyphenate? could you hyphenate? could they hyphenate?	could I be hyphenating? could you be hyphenating? could he be hyphenating? could we be hyphenating? could you be hyphenating? could they be hyphenating?
Perfect	V-ing perfect
could I have hyphenated? could you have hyphenated? could he have hyphenated? could we have hyphenated? could you have hyphenated? could they have hyphenated?	could I have been hyphenating? could you have been hyphenating? could he have been hyphenating? could we have been hyphenating? could you have been hyphenating? could they have been hyphenating?

Interro-negative form

Simple form	V-ing form
couldn't I hyphenate? couldn't you hyphenate? couldn't he hyphenate? couldn't we hyphenate? couldn't you hyphenate? couldn't they hyphenate?	couldn't I be hyphenating? couldn't you be hyphenating? couldn't he be hyphenating? couldn't we be hyphenating? couldn't you be hyphenating? couldn't they be hyphenating?
Perfect	V-ing perfect
couldn't I have hyphenated? couldn't you have hyphenated? couldn't he have hyphenated? couldn't we have hyphenated? couldn't you have hyphenated? couldn't they have hyphenated?	couldn't I have been hyphenating? couldn't you have been hyphenating? couldn't he have been hyphenating? couldn't we have been hyphenating? couldn't you have been hyphenating? couldn't they have been hyphenating?