English verb conjugation
COULD OVERFLOW

Regular verb: overflow - overflowed - overflowed

Affirmation

Simple form	V-ing form
I could overflow you could overflow she could overflow we could overflow you could overflow they could overflow	I could be overflowing you could be overflowing she could be overflowing we could be overflowing you could be overflowing they could be overflowing
Perfect	V-ing perfect
I could have overflowed you could have overflowed she could have overflowed we could have overflowed you could have overflowed they could have overflowed	I could have been overflowing you could have been overflowing she could have been overflowing we could have been overflowing you could have been overflowing they could have been overflowing

Negation

Simple form	V-ing form
I couldn't overflow you couldn't overflow she couldn't overflow we couldn't overflow you couldn't overflow they couldn't overflow	I couldn't be overflowing you couldn't be overflowing she couldn't be overflowing we couldn't be overflowing you couldn't be overflowing they couldn't be overflowing
Perfect	V-ing perfect
I couldn't have overflowed you couldn't have overflowed she couldn't have overflowed we couldn't have overflowed you couldn't have overflowed they couldn't have overflowed	I couldn't have been overflowing you couldn't have been overflowing she couldn't have been overflowing we couldn't have been overflowing you couldn't have been overflowing they couldn't have been overflowing

Interrogative form

Simple form	V-ing form
could I overflow? could you overflow? could she overflow? could we overflow? could you overflow? could they overflow?	could I be overflowing? could you be overflowing? could she be overflowing? could we be overflowing? could you be overflowing? could they be overflowing?
Perfect	V-ing perfect
could I have overflowed? could you have overflowed? could she have overflowed? could we have overflowed? could you have overflowed? could they have overflowed?	could I have been overflowing? could you have been overflowing? could she have been overflowing? could we have been overflowing? could you have been overflowing? could they have been overflowing?

Interro-negative form

Simple form	V-ing form
couldn't I overflow? couldn't you overflow? couldn't she overflow? couldn't we overflow? couldn't you overflow? couldn't they overflow?	couldn't I be overflowing? couldn't you be overflowing? couldn't she be overflowing? couldn't we be overflowing? couldn't you be overflowing? couldn't they be overflowing?
Perfect	V-ing perfect
couldn't I have overflowed? couldn't you have overflowed? couldn't she have overflowed? couldn't we have overflowed? couldn't you have overflowed? couldn't they have overflowed?	couldn't I have been overflowing? couldn't you have been overflowing? couldn't she have been overflowing? couldn't we have been overflowing? couldn't you have been overflowing? couldn't they have been overflowing?