English verb conjugation
COULD DEGREASE

Regular verb: degrease - degreased - degreased

Affirmation

Simple form	V-ing form
I could degrease you could degrease she could degrease we could degrease you could degrease they could degrease	I could be degreasing you could be degreasing she could be degreasing we could be degreasing you could be degreasing they could be degreasing
Perfect	V-ing perfect
I could have degreased you could have degreased she could have degreased we could have degreased you could have degreased they could have degreased	I could have been degreasing you could have been degreasing she could have been degreasing we could have been degreasing you could have been degreasing they could have been degreasing

Negation

Simple form	V-ing form
I couldn't degrease you couldn't degrease she couldn't degrease we couldn't degrease you couldn't degrease they couldn't degrease	I couldn't be degreasing you couldn't be degreasing she couldn't be degreasing we couldn't be degreasing you couldn't be degreasing they couldn't be degreasing
Perfect	V-ing perfect
I couldn't have degreased you couldn't have degreased she couldn't have degreased we couldn't have degreased you couldn't have degreased they couldn't have degreased	I couldn't have been degreasing you couldn't have been degreasing she couldn't have been degreasing we couldn't have been degreasing you couldn't have been degreasing they couldn't have been degreasing

Interrogative form

Simple form	V-ing form
could I degrease? could you degrease? could she degrease? could we degrease? could you degrease? could they degrease?	could I be degreasing? could you be degreasing? could she be degreasing? could we be degreasing? could you be degreasing? could they be degreasing?
Perfect	V-ing perfect
could I have degreased? could you have degreased? could she have degreased? could we have degreased? could you have degreased? could they have degreased?	could I have been degreasing? could you have been degreasing? could she have been degreasing? could we have been degreasing? could you have been degreasing? could they have been degreasing?

Interro-negative form

Simple form	V-ing form
couldn't I degrease? couldn't you degrease? couldn't she degrease? couldn't we degrease? couldn't you degrease? couldn't they degrease?	couldn't I be degreasing? couldn't you be degreasing? couldn't she be degreasing? couldn't we be degreasing? couldn't you be degreasing? couldn't they be degreasing?
Perfect	V-ing perfect
couldn't I have degreased? couldn't you have degreased? couldn't she have degreased? couldn't we have degreased? couldn't you have degreased? couldn't they have degreased?	couldn't I have been degreasing? couldn't you have been degreasing? couldn't she have been degreasing? couldn't we have been degreasing? couldn't you have been degreasing? couldn't they have been degreasing?