English verb conjugation
CAN THRESH

Regular verb: thresh - threshed - threshed

Affirmation

Simple form	V-ing form
I can thresh you can thresh he can thresh we can thresh you can thresh they can thresh	I can be threshing you can be threshing he can be threshing we can be threshing you can be threshing they can be threshing
Perfect	V-ing perfect
I can have threshed you can have threshed he can have threshed we can have threshed you can have threshed they can have threshed	I can have been threshing you can have been threshing he can have been threshing we can have been threshing you can have been threshing they can have been threshing

Negation

Simple form	V-ing form
I can't thresh you can't thresh he can't thresh we can't thresh you can't thresh they can't thresh	I can't be threshing you can't be threshing he can't be threshing we can't be threshing you can't be threshing they can't be threshing
Perfect	V-ing perfect
I can't have threshed you can't have threshed he can't have threshed we can't have threshed you can't have threshed they can't have threshed	I can't have been threshing you can't have been threshing he can't have been threshing we can't have been threshing you can't have been threshing they can't have been threshing

Interrogative form

Simple form	V-ing form
can I thresh? can you thresh? can he thresh? can we thresh? can you thresh? can they thresh?	can I be threshing? can you be threshing? can he be threshing? can we be threshing? can you be threshing? can they be threshing?
Perfect	V-ing perfect
can I have threshed? can you have threshed? can he have threshed? can we have threshed? can you have threshed? can they have threshed?	can I have been threshing? can you have been threshing? can he have been threshing? can we have been threshing? can you have been threshing? can they have been threshing?

Interro-negative form

Simple form	V-ing form
can't I thresh? can't you thresh? can't he thresh? can't we thresh? can't you thresh? can't they thresh?	can't I be threshing? can't you be threshing? can't he be threshing? can't we be threshing? can't you be threshing? can't they be threshing?
Perfect	V-ing perfect
can't I have threshed? can't you have threshed? can't he have threshed? can't we have threshed? can't you have threshed? can't they have threshed?	can't I have been threshing? can't you have been threshing? can't he have been threshing? can't we have been threshing? can't you have been threshing? can't they have been threshing?