English verb conjugation
SHOULD GRUMBLE

Regular verb: grumble - grumbled - grumbled

Affirmation

Simple form	V-ing form
I should grumble you should grumble he should grumble we should grumble you should grumble they should grumble	I should be grumbling you should be grumbling he should be grumbling we should be grumbling you should be grumbling they should be grumbling
Perfect	V-ing perfect
I should have grumbled you should have grumbled he should have grumbled we should have grumbled you should have grumbled they should have grumbled	I should have been grumbling you should have been grumbling he should have been grumbling we should have been grumbling you should have been grumbling they should have been grumbling

Negation

Simple form	V-ing form
I should not grumble you should not grumble he should not grumble we should not grumble you should not grumble they should not grumble	I should not be grumbling you should not be grumbling he should not be grumbling we should not be grumbling you should not be grumbling they should not be grumbling
Perfect	V-ing perfect
I should not have grumbled you should not have grumbled he should not have grumbled we should not have grumbled you should not have grumbled they should not have grumbled	I should not have been grumbling you should not have been grumbling he should not have been grumbling we should not have been grumbling you should not have been grumbling they should not have been grumbling

Interrogative form

Simple form	V-ing form
should I grumble? should you grumble? should he grumble? should we grumble? should you grumble? should they grumble?	should I be grumbling? should you be grumbling? should he be grumbling? should we be grumbling? should you be grumbling? should they be grumbling?
Perfect	V-ing perfect
should I have grumbled? should you have grumbled? should he have grumbled? should we have grumbled? should you have grumbled? should they have grumbled?	should I have been grumbling? should you have been grumbling? should he have been grumbling? should we have been grumbling? should you have been grumbling? should they have been grumbling?

Interro-negative form

Simple form	V-ing form
should I not grumble? should you not grumble? should he not grumble? should we not grumble? should you not grumble? should they not grumble?	should I not be grumbling? should you not be grumbling? should he not be grumbling? should we not be grumbling? should you not be grumbling? should they not be grumbling?
Perfect	V-ing perfect
should I not have grumbled? should you not have grumbled? should he not have grumbled? should we not have grumbled? should you not have grumbled? should they not have grumbled?	should I not have been grumbling? should you not have been grumbling? should he not have been grumbling? should we not have been grumbling? should you not have been grumbling? should they not have been grumbling?