English verb conjugation
CAN YIP

Regular verb: yip - yipped - yipped

Affirmation

Simple form	V-ing form
I can yip you can yip she can yip we can yip you can yip they can yip	I can be yipping you can be yipping she can be yipping we can be yipping you can be yipping they can be yipping
Perfect	V-ing perfect
I can have yipped you can have yipped she can have yipped we can have yipped you can have yipped they can have yipped	I can have been yipping you can have been yipping she can have been yipping we can have been yipping you can have been yipping they can have been yipping

Negation

Simple form	V-ing form
I can't yip you can't yip she can't yip we can't yip you can't yip they can't yip	I can't be yipping you can't be yipping she can't be yipping we can't be yipping you can't be yipping they can't be yipping
Perfect	V-ing perfect
I can't have yipped you can't have yipped she can't have yipped we can't have yipped you can't have yipped they can't have yipped	I can't have been yipping you can't have been yipping she can't have been yipping we can't have been yipping you can't have been yipping they can't have been yipping

Interrogative form

Simple form	V-ing form
can I yip? can you yip? can she yip? can we yip? can you yip? can they yip?	can I be yipping? can you be yipping? can she be yipping? can we be yipping? can you be yipping? can they be yipping?
Perfect	V-ing perfect
can I have yipped? can you have yipped? can she have yipped? can we have yipped? can you have yipped? can they have yipped?	can I have been yipping? can you have been yipping? can she have been yipping? can we have been yipping? can you have been yipping? can they have been yipping?

Interro-negative form

Simple form	V-ing form
can't I yip? can't you yip? can't she yip? can't we yip? can't you yip? can't they yip?	can't I be yipping? can't you be yipping? can't she be yipping? can't we be yipping? can't you be yipping? can't they be yipping?
Perfect	V-ing perfect
can't I have yipped? can't you have yipped? can't she have yipped? can't we have yipped? can't you have yipped? can't they have yipped?	can't I have been yipping? can't you have been yipping? can't she have been yipping? can't we have been yipping? can't you have been yipping? can't they have been yipping?