English verb conjugation
COULD MUFFLE

Regular verb: muffle - muffled - muffled

Affirmation

Simple form	V-ing form
I could muffle you could muffle he could muffle we could muffle you could muffle they could muffle	I could be muffling you could be muffling he could be muffling we could be muffling you could be muffling they could be muffling
Perfect	V-ing perfect
I could have muffled you could have muffled he could have muffled we could have muffled you could have muffled they could have muffled	I could have been muffling you could have been muffling he could have been muffling we could have been muffling you could have been muffling they could have been muffling

Negation

Simple form	V-ing form
I could not muffle you could not muffle he could not muffle we could not muffle you could not muffle they could not muffle	I could not be muffling you could not be muffling he could not be muffling we could not be muffling you could not be muffling they could not be muffling
Perfect	V-ing perfect
I could not have muffled you could not have muffled he could not have muffled we could not have muffled you could not have muffled they could not have muffled	I could not have been muffling you could not have been muffling he could not have been muffling we could not have been muffling you could not have been muffling they could not have been muffling

Interrogative form

Simple form	V-ing form
could I muffle? could you muffle? could he muffle? could we muffle? could you muffle? could they muffle?	could I be muffling? could you be muffling? could he be muffling? could we be muffling? could you be muffling? could they be muffling?
Perfect	V-ing perfect
could I have muffled? could you have muffled? could he have muffled? could we have muffled? could you have muffled? could they have muffled?	could I have been muffling? could you have been muffling? could he have been muffling? could we have been muffling? could you have been muffling? could they have been muffling?

Interro-negative form

Simple form	V-ing form
could I not muffle? could you not muffle? could he not muffle? could we not muffle? could you not muffle? could they not muffle?	could I not be muffling? could you not be muffling? could he not be muffling? could we not be muffling? could you not be muffling? could they not be muffling?
Perfect	V-ing perfect
could I not have muffled? could you not have muffled? could he not have muffled? could we not have muffled? could you not have muffled? could they not have muffled?	could I not have been muffling? could you not have been muffling? could he not have been muffling? could we not have been muffling? could you not have been muffling? could they not have been muffling?