English verb conjugation
COULD DROP

Regular verb: drop - dropped - dropped

Affirmation

Simple form	V-ing form
I could drop you could drop she could drop we could drop you could drop they could drop	I could be dropping you could be dropping she could be dropping we could be dropping you could be dropping they could be dropping
Perfect	V-ing perfect
I could have dropped you could have dropped she could have dropped we could have dropped you could have dropped they could have dropped	I could have been dropping you could have been dropping she could have been dropping we could have been dropping you could have been dropping they could have been dropping

Negation

Simple form	V-ing form
I could not drop you could not drop she could not drop we could not drop you could not drop they could not drop	I could not be dropping you could not be dropping she could not be dropping we could not be dropping you could not be dropping they could not be dropping
Perfect	V-ing perfect
I could not have dropped you could not have dropped she could not have dropped we could not have dropped you could not have dropped they could not have dropped	I could not have been dropping you could not have been dropping she could not have been dropping we could not have been dropping you could not have been dropping they could not have been dropping

Interrogative form

Simple form	V-ing form
could I drop? could you drop? could she drop? could we drop? could you drop? could they drop?	could I be dropping? could you be dropping? could she be dropping? could we be dropping? could you be dropping? could they be dropping?
Perfect	V-ing perfect
could I have dropped? could you have dropped? could she have dropped? could we have dropped? could you have dropped? could they have dropped?	could I have been dropping? could you have been dropping? could she have been dropping? could we have been dropping? could you have been dropping? could they have been dropping?

Interro-negative form

Simple form	V-ing form
could I not drop? could you not drop? could she not drop? could we not drop? could you not drop? could they not drop?	could I not be dropping? could you not be dropping? could she not be dropping? could we not be dropping? could you not be dropping? could they not be dropping?
Perfect	V-ing perfect
could I not have dropped? could you not have dropped? could she not have dropped? could we not have dropped? could you not have dropped? could they not have dropped?	could I not have been dropping? could you not have been dropping? could she not have been dropping? could we not have been dropping? could you not have been dropping? could they not have been dropping?