English verb conjugation
CAN PERCH

Regular verb: perch - perched - perched

Affirmation

Simple form	V-ing form
I can perch you can perch he can perch we can perch you can perch they can perch	I can be perching you can be perching he can be perching we can be perching you can be perching they can be perching
Perfect	V-ing perfect
I can have perched you can have perched he can have perched we can have perched you can have perched they can have perched	I can have been perching you can have been perching he can have been perching we can have been perching you can have been perching they can have been perching

Negation

Simple form	V-ing form
I can't perch you can't perch he can't perch we can't perch you can't perch they can't perch	I can't be perching you can't be perching he can't be perching we can't be perching you can't be perching they can't be perching
Perfect	V-ing perfect
I can't have perched you can't have perched he can't have perched we can't have perched you can't have perched they can't have perched	I can't have been perching you can't have been perching he can't have been perching we can't have been perching you can't have been perching they can't have been perching

Interrogative form

Simple form	V-ing form
can I perch? can you perch? can he perch? can we perch? can you perch? can they perch?	can I be perching? can you be perching? can he be perching? can we be perching? can you be perching? can they be perching?
Perfect	V-ing perfect
can I have perched? can you have perched? can he have perched? can we have perched? can you have perched? can they have perched?	can I have been perching? can you have been perching? can he have been perching? can we have been perching? can you have been perching? can they have been perching?

Interro-negative form

Simple form	V-ing form
can't I perch? can't you perch? can't he perch? can't we perch? can't you perch? can't they perch?	can't I be perching? can't you be perching? can't he be perching? can't we be perching? can't you be perching? can't they be perching?
Perfect	V-ing perfect
can't I have perched? can't you have perched? can't he have perched? can't we have perched? can't you have perched? can't they have perched?	can't I have been perching? can't you have been perching? can't he have been perching? can't we have been perching? can't you have been perching? can't they have been perching?