English verb conjugation
CAN GROUCH

Regular verb: grouch - grouched - grouched

Affirmation

Simple form	V-ing form
I can grouch you can grouch he can grouch we can grouch you can grouch they can grouch	I can be grouching you can be grouching he can be grouching we can be grouching you can be grouching they can be grouching
Perfect	V-ing perfect
I can have grouched you can have grouched he can have grouched we can have grouched you can have grouched they can have grouched	I can have been grouching you can have been grouching he can have been grouching we can have been grouching you can have been grouching they can have been grouching

Negation

Simple form	V-ing form
I can't grouch you can't grouch he can't grouch we can't grouch you can't grouch they can't grouch	I can't be grouching you can't be grouching he can't be grouching we can't be grouching you can't be grouching they can't be grouching
Perfect	V-ing perfect
I can't have grouched you can't have grouched he can't have grouched we can't have grouched you can't have grouched they can't have grouched	I can't have been grouching you can't have been grouching he can't have been grouching we can't have been grouching you can't have been grouching they can't have been grouching

Interrogative form

Simple form	V-ing form
can I grouch? can you grouch? can he grouch? can we grouch? can you grouch? can they grouch?	can I be grouching? can you be grouching? can he be grouching? can we be grouching? can you be grouching? can they be grouching?
Perfect	V-ing perfect
can I have grouched? can you have grouched? can he have grouched? can we have grouched? can you have grouched? can they have grouched?	can I have been grouching? can you have been grouching? can he have been grouching? can we have been grouching? can you have been grouching? can they have been grouching?

Interro-negative form

Simple form	V-ing form
can't I grouch? can't you grouch? can't he grouch? can't we grouch? can't you grouch? can't they grouch?	can't I be grouching? can't you be grouching? can't he be grouching? can't we be grouching? can't you be grouching? can't they be grouching?
Perfect	V-ing perfect
can't I have grouched? can't you have grouched? can't he have grouched? can't we have grouched? can't you have grouched? can't they have grouched?	can't I have been grouching? can't you have been grouching? can't he have been grouching? can't we have been grouching? can't you have been grouching? can't they have been grouching?