English verb conjugation
CAN SWITCH

Regular verb: switch - switched - switched

Affirmation

Simple form	V-ing form
I can switch you can switch she can switch we can switch you can switch they can switch	I can be switching you can be switching she can be switching we can be switching you can be switching they can be switching
Perfect	V-ing perfect
I can have switched you can have switched she can have switched we can have switched you can have switched they can have switched	I can have been switching you can have been switching she can have been switching we can have been switching you can have been switching they can have been switching

Negation

Simple form	V-ing form
I can't switch you can't switch she can't switch we can't switch you can't switch they can't switch	I can't be switching you can't be switching she can't be switching we can't be switching you can't be switching they can't be switching
Perfect	V-ing perfect
I can't have switched you can't have switched she can't have switched we can't have switched you can't have switched they can't have switched	I can't have been switching you can't have been switching she can't have been switching we can't have been switching you can't have been switching they can't have been switching

Interrogative form

Simple form	V-ing form
can I switch? can you switch? can she switch? can we switch? can you switch? can they switch?	can I be switching? can you be switching? can she be switching? can we be switching? can you be switching? can they be switching?
Perfect	V-ing perfect
can I have switched? can you have switched? can she have switched? can we have switched? can you have switched? can they have switched?	can I have been switching? can you have been switching? can she have been switching? can we have been switching? can you have been switching? can they have been switching?

Interro-negative form

Simple form	V-ing form
can't I switch? can't you switch? can't she switch? can't we switch? can't you switch? can't they switch?	can't I be switching? can't you be switching? can't she be switching? can't we be switching? can't you be switching? can't they be switching?
Perfect	V-ing perfect
can't I have switched? can't you have switched? can't she have switched? can't we have switched? can't you have switched? can't they have switched?	can't I have been switching? can't you have been switching? can't she have been switching? can't we have been switching? can't you have been switching? can't they have been switching?