English verb conjugation
CAN DROP

Regular verb: drop - dropped - dropped

Affirmation

Simple form	V-ing form
I can drop you can drop he can drop we can drop you can drop they can drop	I can be dropping you can be dropping he 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 he 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 he 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 he 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 he 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 he 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 he 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 he drop? can we drop? can you drop? can they drop?	can I be dropping? can you be dropping? can he 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 he 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 he 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 he 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 he 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 he 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 he have been dropping? can't we have been dropping? can't you have been dropping? can't they have been dropping?