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 can't drop you can't drop she can't drop we can't drop you can't drop they can't drop	I can't be dropping you can't be dropping she can't be dropping we can't be dropping you can't be dropping they can't be dropping
Perfect	V-ing perfect
I can't have dropped you can't have dropped she can't have dropped we can't have dropped you can't have dropped they can't have dropped	I can't have been dropping you can't have been dropping she can't have been dropping we can't have been dropping you can't have been dropping they can't 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't I drop? can't you drop? can't she drop? can't we drop? can't you drop? can't they drop?	can't I be dropping? can't you be dropping? can't she be dropping? can't we be dropping? can't you be dropping? can't they be dropping?
Perfect	V-ing perfect
can't I have dropped? can't you have dropped? can't she have dropped? can't we have dropped? can't you have dropped? can't they have dropped?	can't I have been dropping? can't you have been dropping? can't she have been dropping? can't we have been dropping? can't you have been dropping? can't they have been dropping?