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 cannot grouch you cannot grouch he cannot grouch we cannot grouch you cannot grouch they cannot grouch	I cannot be grouching you cannot be grouching he cannot be grouching we cannot be grouching you cannot be grouching they cannot be grouching
Perfect	V-ing perfect
I cannot have grouched you cannot have grouched he cannot have grouched we cannot have grouched you cannot have grouched they cannot have grouched	I cannot have been grouching you cannot have been grouching he cannot have been grouching we cannot have been grouching you cannot have been grouching they cannot 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 I not grouch? can you not grouch? can he not grouch? can we not grouch? can you not grouch? can they not grouch?	can I not be grouching? can you not be grouching? can he not be grouching? can we not be grouching? can you not be grouching? can they not be grouching?
Perfect	V-ing perfect
can I not have grouched? can you not have grouched? can he not have grouched? can we not have grouched? can you not have grouched? can they not have grouched?	can I not have been grouching? can you not have been grouching? can he not have been grouching? can we not have been grouching? can you not have been grouching? can they not have been grouching?