English verb conjugation
CAN DROP

Regular verb: drop - dropped - dropped

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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