English verb conjugation
COULD ROSIN

Regular verb: rosin - rosined - rosined

Affirmation

Simple form	V-ing form
I could rosin you could rosin he could rosin we could rosin you could rosin they could rosin	I could be rosining you could be rosining he could be rosining we could be rosining you could be rosining they could be rosining
Perfect	V-ing perfect
I could have rosined you could have rosined he could have rosined we could have rosined you could have rosined they could have rosined	I could have been rosining you could have been rosining he could have been rosining we could have been rosining you could have been rosining they could have been rosining

Negation

Simple form	V-ing form
I could not rosin you could not rosin he could not rosin we could not rosin you could not rosin they could not rosin	I could not be rosining you could not be rosining he could not be rosining we could not be rosining you could not be rosining they could not be rosining
Perfect	V-ing perfect
I could not have rosined you could not have rosined he could not have rosined we could not have rosined you could not have rosined they could not have rosined	I could not have been rosining you could not have been rosining he could not have been rosining we could not have been rosining you could not have been rosining they could not have been rosining

Interrogative form

Simple form	V-ing form
could I rosin? could you rosin? could he rosin? could we rosin? could you rosin? could they rosin?	could I be rosining? could you be rosining? could he be rosining? could we be rosining? could you be rosining? could they be rosining?
Perfect	V-ing perfect
could I have rosined? could you have rosined? could he have rosined? could we have rosined? could you have rosined? could they have rosined?	could I have been rosining? could you have been rosining? could he have been rosining? could we have been rosining? could you have been rosining? could they have been rosining?

Interro-negative form

Simple form	V-ing form
could I not rosin? could you not rosin? could he not rosin? could we not rosin? could you not rosin? could they not rosin?	could I not be rosining? could you not be rosining? could he not be rosining? could we not be rosining? could you not be rosining? could they not be rosining?
Perfect	V-ing perfect
could I not have rosined? could you not have rosined? could he not have rosined? could we not have rosined? could you not have rosined? could they not have rosined?	could I not have been rosining? could you not have been rosining? could he not have been rosining? could we not have been rosining? could you not have been rosining? could they not have been rosining?