English verb conjugation
CAN SWITCH

Regular verb: switch - switched - switched

Affirmation

Simple form	V-ing form
I can switch you can switch he can switch we can switch you can switch they can switch	I can be switching you can be switching he 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 he 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 he 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 cannot switch you cannot switch he cannot switch we cannot switch you cannot switch they cannot switch	I cannot be switching you cannot be switching he cannot be switching we cannot be switching you cannot be switching they cannot be switching
Perfect	V-ing perfect
I cannot have switched you cannot have switched he cannot have switched we cannot have switched you cannot have switched they cannot have switched	I cannot have been switching you cannot have been switching he cannot have been switching we cannot have been switching you cannot have been switching they cannot have been switching

Interrogative form

Simple form	V-ing form
can I switch? can you switch? can he switch? can we switch? can you switch? can they switch?	can I be switching? can you be switching? can he 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 he 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 he 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 I not switch? can you not switch? can he not switch? can we not switch? can you not switch? can they not switch?	can I not be switching? can you not be switching? can he not be switching? can we not be switching? can you not be switching? can they not be switching?
Perfect	V-ing perfect
can I not have switched? can you not have switched? can he not have switched? can we not have switched? can you not have switched? can they not have switched?	can I not have been switching? can you not have been switching? can he not have been switching? can we not have been switching? can you not have been switching? can they not have been switching?