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 can't pip you can't pip he can't pip we can't pip you can't pip they can't pip	I can't be pipping you can't be pipping he can't be pipping we can't be pipping you can't be pipping they can't be pipping
Perfect	V-ing perfect
I can't have pipped you can't have pipped he can't have pipped we can't have pipped you can't have pipped they can't have pipped	I can't have been pipping you can't have been pipping he can't have been pipping we can't have been pipping you can't have been pipping they can't 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't I pip? can't you pip? can't he pip? can't we pip? can't you pip? can't they pip?	can't I be pipping? can't you be pipping? can't he be pipping? can't we be pipping? can't you be pipping? can't they be pipping?
Perfect	V-ing perfect
can't I have pipped? can't you have pipped? can't he have pipped? can't we have pipped? can't you have pipped? can't they have pipped?	can't I have been pipping? can't you have been pipping? can't he have been pipping? can't we have been pipping? can't you have been pipping? can't they have been pipping?