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 can't trip you can't trip he can't trip we can't trip you can't trip they can't trip	I can't be tripping you can't be tripping he can't be tripping we can't be tripping you can't be tripping they can't be tripping
Perfect	V-ing perfect
I can't have tripped you can't have tripped he can't have tripped we can't have tripped you can't have tripped they can't have tripped	I can't have been tripping you can't have been tripping he can't have been tripping we can't have been tripping you can't have been tripping they can't 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't I trip? can't you trip? can't he trip? can't we trip? can't you trip? can't they trip?	can't I be tripping? can't you be tripping? can't he be tripping? can't we be tripping? can't you be tripping? can't they be tripping?
Perfect	V-ing perfect
can't I have tripped? can't you have tripped? can't he have tripped? can't we have tripped? can't you have tripped? can't they have tripped?	can't I have been tripping? can't you have been tripping? can't he have been tripping? can't we have been tripping? can't you have been tripping? can't they have been tripping?