English verb conjugation
CAN PIP

Regular verb: pip - pipped - pipped

Affirmation

Simple form	V-ing form
I can pip you can pip he can pip we can pip you can pip they can pip	I can be pipping you can be pipping he can be pipping we can be pipping you can be pipping they can be pipping
Perfect	V-ing perfect
I can have pipped you can have pipped he can have pipped we can have pipped you can have pipped they can have pipped	I can have been pipping you can have been pipping he can have been pipping we can have been pipping you can have been pipping they can have been pipping

Negation

Simple form	V-ing form
I cannot pip you cannot pip he cannot pip we cannot pip you cannot pip they cannot pip	I cannot be pipping you cannot be pipping he cannot be pipping we cannot be pipping you cannot be pipping they cannot be pipping
Perfect	V-ing perfect
I cannot have pipped you cannot have pipped he cannot have pipped we cannot have pipped you cannot have pipped they cannot have pipped	I cannot have been pipping you cannot have been pipping he cannot have been pipping we cannot have been pipping you cannot have been pipping they cannot have been pipping

Interrogative form

Simple form	V-ing form
can I pip? can you pip? can he pip? can we pip? can you pip? can they pip?	can I be pipping? can you be pipping? can he be pipping? can we be pipping? can you be pipping? can they be pipping?
Perfect	V-ing perfect
can I have pipped? can you have pipped? can he have pipped? can we have pipped? can you have pipped? can they have pipped?	can I have been pipping? can you have been pipping? can he have been pipping? can we have been pipping? can you have been pipping? can they have been pipping?

Interro-negative form

Simple form	V-ing form
can I not pip? can you not pip? can he not pip? can we not pip? can you not pip? can they not pip?	can I not be pipping? can you not be pipping? can he not be pipping? can we not be pipping? can you not be pipping? can they not be pipping?
Perfect	V-ing perfect
can I not have pipped? can you not have pipped? can he not have pipped? can we not have pipped? can you not have pipped? can they not have pipped?	can I not have been pipping? can you not have been pipping? can he not have been pipping? can we not have been pipping? can you not have been pipping? can they not have been pipping?