English verb conjugation
CAN TRIP

Regular verb: trip - tripped - tripped

Affirmation

Simple form	V-ing form
I can trip you can trip she can trip we can trip you can trip they can trip	I can be tripping you can be tripping she can be tripping we can be tripping you can be tripping they can be tripping
Perfect	V-ing perfect
I can have tripped you can have tripped she can have tripped we can have tripped you can have tripped they can have tripped	I can have been tripping you can have been tripping she can have been tripping we can have been tripping you can have been tripping they can have been tripping

Negation

Simple form	V-ing form
I cannot trip you cannot trip she cannot trip we cannot trip you cannot trip they cannot trip	I cannot be tripping you cannot be tripping she cannot be tripping we cannot be tripping you cannot be tripping they cannot be tripping
Perfect	V-ing perfect
I cannot have tripped you cannot have tripped she cannot have tripped we cannot have tripped you cannot have tripped they cannot have tripped	I cannot have been tripping you cannot have been tripping she cannot have been tripping we cannot have been tripping you cannot have been tripping they cannot have been tripping

Interrogative form

Simple form	V-ing form
can I trip? can you trip? can she trip? can we trip? can you trip? can they trip?	can I be tripping? can you be tripping? can she be tripping? can we be tripping? can you be tripping? can they be tripping?
Perfect	V-ing perfect
can I have tripped? can you have tripped? can she have tripped? can we have tripped? can you have tripped? can they have tripped?	can I have been tripping? can you have been tripping? can she have been tripping? can we have been tripping? can you have been tripping? can they have been tripping?

Interro-negative form

Simple form	V-ing form
can I not trip? can you not trip? can she not trip? can we not trip? can you not trip? can they not trip?	can I not be tripping? can you not be tripping? can she not be tripping? can we not be tripping? can you not be tripping? can they not be tripping?
Perfect	V-ing perfect
can I not have tripped? can you not have tripped? can she not have tripped? can we not have tripped? can you not have tripped? can they not have tripped?	can I not have been tripping? can you not have been tripping? can she not have been tripping? can we not have been tripping? can you not have been tripping? can they not have been tripping?