English verb conjugation
COULD STARCH

Regular verb: starch - starched - starched

Affirmation

Simple form	V-ing form
I could starch you could starch she could starch we could starch you could starch they could starch	I could be starching you could be starching she could be starching we could be starching you could be starching they could be starching
Perfect	V-ing perfect
I could have starched you could have starched she could have starched we could have starched you could have starched they could have starched	I could have been starching you could have been starching she could have been starching we could have been starching you could have been starching they could have been starching

Negation

Simple form	V-ing form
I could not starch you could not starch she could not starch we could not starch you could not starch they could not starch	I could not be starching you could not be starching she could not be starching we could not be starching you could not be starching they could not be starching
Perfect	V-ing perfect
I could not have starched you could not have starched she could not have starched we could not have starched you could not have starched they could not have starched	I could not have been starching you could not have been starching she could not have been starching we could not have been starching you could not have been starching they could not have been starching

Interrogative form

Simple form	V-ing form
could I starch? could you starch? could she starch? could we starch? could you starch? could they starch?	could I be starching? could you be starching? could she be starching? could we be starching? could you be starching? could they be starching?
Perfect	V-ing perfect
could I have starched? could you have starched? could she have starched? could we have starched? could you have starched? could they have starched?	could I have been starching? could you have been starching? could she have been starching? could we have been starching? could you have been starching? could they have been starching?

Interro-negative form

Simple form	V-ing form
could I not starch? could you not starch? could she not starch? could we not starch? could you not starch? could they not starch?	could I not be starching? could you not be starching? could she not be starching? could we not be starching? could you not be starching? could they not be starching?
Perfect	V-ing perfect
could I not have starched? could you not have starched? could she not have starched? could we not have starched? could you not have starched? could they not have starched?	could I not have been starching? could you not have been starching? could she not have been starching? could we not have been starching? could you not have been starching? could they not have been starching?