English verb conjugation
CAN THWACK

Regular verb: thwack - thwacked - thwacked

Affirmation

Simple form	V-ing form
I can thwack you can thwack she can thwack we can thwack you can thwack they can thwack	I can be thwacking you can be thwacking she can be thwacking we can be thwacking you can be thwacking they can be thwacking
Perfect	V-ing perfect
I can have thwacked you can have thwacked she can have thwacked we can have thwacked you can have thwacked they can have thwacked	I can have been thwacking you can have been thwacking she can have been thwacking we can have been thwacking you can have been thwacking they can have been thwacking

Negation

Simple form	V-ing form
I can't thwack you can't thwack she can't thwack we can't thwack you can't thwack they can't thwack	I can't be thwacking you can't be thwacking she can't be thwacking we can't be thwacking you can't be thwacking they can't be thwacking
Perfect	V-ing perfect
I can't have thwacked you can't have thwacked she can't have thwacked we can't have thwacked you can't have thwacked they can't have thwacked	I can't have been thwacking you can't have been thwacking she can't have been thwacking we can't have been thwacking you can't have been thwacking they can't have been thwacking

Interrogative form

Simple form	V-ing form
can I thwack? can you thwack? can she thwack? can we thwack? can you thwack? can they thwack?	can I be thwacking? can you be thwacking? can she be thwacking? can we be thwacking? can you be thwacking? can they be thwacking?
Perfect	V-ing perfect
can I have thwacked? can you have thwacked? can she have thwacked? can we have thwacked? can you have thwacked? can they have thwacked?	can I have been thwacking? can you have been thwacking? can she have been thwacking? can we have been thwacking? can you have been thwacking? can they have been thwacking?

Interro-negative form

Simple form	V-ing form
can't I thwack? can't you thwack? can't she thwack? can't we thwack? can't you thwack? can't they thwack?	can't I be thwacking? can't you be thwacking? can't she be thwacking? can't we be thwacking? can't you be thwacking? can't they be thwacking?
Perfect	V-ing perfect
can't I have thwacked? can't you have thwacked? can't she have thwacked? can't we have thwacked? can't you have thwacked? can't they have thwacked?	can't I have been thwacking? can't you have been thwacking? can't she have been thwacking? can't we have been thwacking? can't you have been thwacking? can't they have been thwacking?