English verb conjugation
CAN SAP

Regular verb: sap - sapped - sapped

Affirmation

Simple form	V-ing form
I can sap you can sap she can sap we can sap you can sap they can sap	I can be sapping you can be sapping she can be sapping we can be sapping you can be sapping they can be sapping
Perfect	V-ing perfect
I can have sapped you can have sapped she can have sapped we can have sapped you can have sapped they can have sapped	I can have been sapping you can have been sapping she can have been sapping we can have been sapping you can have been sapping they can have been sapping

Negation

Simple form	V-ing form
I can't sap you can't sap she can't sap we can't sap you can't sap they can't sap	I can't be sapping you can't be sapping she can't be sapping we can't be sapping you can't be sapping they can't be sapping
Perfect	V-ing perfect
I can't have sapped you can't have sapped she can't have sapped we can't have sapped you can't have sapped they can't have sapped	I can't have been sapping you can't have been sapping she can't have been sapping we can't have been sapping you can't have been sapping they can't have been sapping

Interrogative form

Simple form	V-ing form
can I sap? can you sap? can she sap? can we sap? can you sap? can they sap?	can I be sapping? can you be sapping? can she be sapping? can we be sapping? can you be sapping? can they be sapping?
Perfect	V-ing perfect
can I have sapped? can you have sapped? can she have sapped? can we have sapped? can you have sapped? can they have sapped?	can I have been sapping? can you have been sapping? can she have been sapping? can we have been sapping? can you have been sapping? can they have been sapping?

Interro-negative form

Simple form	V-ing form
can't I sap? can't you sap? can't she sap? can't we sap? can't you sap? can't they sap?	can't I be sapping? can't you be sapping? can't she be sapping? can't we be sapping? can't you be sapping? can't they be sapping?
Perfect	V-ing perfect
can't I have sapped? can't you have sapped? can't she have sapped? can't we have sapped? can't you have sapped? can't they have sapped?	can't I have been sapping? can't you have been sapping? can't she have been sapping? can't we have been sapping? can't you have been sapping? can't they have been sapping?