English verb conjugation
CAN BACKSTROKE

Regular verb: backstroke - backstroked - backstroked

Affirmation

Simple form	V-ing form
I can backstroke you can backstroke she can backstroke we can backstroke you can backstroke they can backstroke	I can be backstroking you can be backstroking she can be backstroking we can be backstroking you can be backstroking they can be backstroking
Perfect	V-ing perfect
I can have backstroked you can have backstroked she can have backstroked we can have backstroked you can have backstroked they can have backstroked	I can have been backstroking you can have been backstroking she can have been backstroking we can have been backstroking you can have been backstroking they can have been backstroking

Negation

Simple form	V-ing form
I can't backstroke you can't backstroke she can't backstroke we can't backstroke you can't backstroke they can't backstroke	I can't be backstroking you can't be backstroking she can't be backstroking we can't be backstroking you can't be backstroking they can't be backstroking
Perfect	V-ing perfect
I can't have backstroked you can't have backstroked she can't have backstroked we can't have backstroked you can't have backstroked they can't have backstroked	I can't have been backstroking you can't have been backstroking she can't have been backstroking we can't have been backstroking you can't have been backstroking they can't have been backstroking

Interrogative form

Simple form	V-ing form
can I backstroke? can you backstroke? can she backstroke? can we backstroke? can you backstroke? can they backstroke?	can I be backstroking? can you be backstroking? can she be backstroking? can we be backstroking? can you be backstroking? can they be backstroking?
Perfect	V-ing perfect
can I have backstroked? can you have backstroked? can she have backstroked? can we have backstroked? can you have backstroked? can they have backstroked?	can I have been backstroking? can you have been backstroking? can she have been backstroking? can we have been backstroking? can you have been backstroking? can they have been backstroking?

Interro-negative form

Simple form	V-ing form
can't I backstroke? can't you backstroke? can't she backstroke? can't we backstroke? can't you backstroke? can't they backstroke?	can't I be backstroking? can't you be backstroking? can't she be backstroking? can't we be backstroking? can't you be backstroking? can't they be backstroking?
Perfect	V-ing perfect
can't I have backstroked? can't you have backstroked? can't she have backstroked? can't we have backstroked? can't you have backstroked? can't they have backstroked?	can't I have been backstroking? can't you have been backstroking? can't she have been backstroking? can't we have been backstroking? can't you have been backstroking? can't they have been backstroking?