English verb conjugation
CAN TRIP

Regular verb: trip - tripped - tripped

Affirmation

Simple form	V-ing form
I can trip you can trip he can trip we can trip you can trip they can trip	I can be tripping you can be tripping he 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 he 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 he 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 he cannot trip we cannot trip you cannot trip they cannot trip	I cannot be tripping you cannot be tripping he 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 he 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 he 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 he trip? can we trip? can you trip? can they trip?	can I be tripping? can you be tripping? can he 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 he 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 he 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 he 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 he 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 he 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 he not have been tripping? can we not have been tripping? can you not have been tripping? can they not have been tripping?