English verb conjugation
CAN FROTH

Regular verb: froth - frothed - frothed

Affirmation

Simple form	V-ing form
I can froth you can froth he can froth we can froth you can froth they can froth	I can be frothing you can be frothing he can be frothing we can be frothing you can be frothing they can be frothing
Perfect	V-ing perfect
I can have frothed you can have frothed he can have frothed we can have frothed you can have frothed they can have frothed	I can have been frothing you can have been frothing he can have been frothing we can have been frothing you can have been frothing they can have been frothing

Negation

Simple form	V-ing form
I can't froth you can't froth he can't froth we can't froth you can't froth they can't froth	I can't be frothing you can't be frothing he can't be frothing we can't be frothing you can't be frothing they can't be frothing
Perfect	V-ing perfect
I can't have frothed you can't have frothed he can't have frothed we can't have frothed you can't have frothed they can't have frothed	I can't have been frothing you can't have been frothing he can't have been frothing we can't have been frothing you can't have been frothing they can't have been frothing

Interrogative form

Simple form	V-ing form
can I froth? can you froth? can he froth? can we froth? can you froth? can they froth?	can I be frothing? can you be frothing? can he be frothing? can we be frothing? can you be frothing? can they be frothing?
Perfect	V-ing perfect
can I have frothed? can you have frothed? can he have frothed? can we have frothed? can you have frothed? can they have frothed?	can I have been frothing? can you have been frothing? can he have been frothing? can we have been frothing? can you have been frothing? can they have been frothing?

Interro-negative form

Simple form	V-ing form
can't I froth? can't you froth? can't he froth? can't we froth? can't you froth? can't they froth?	can't I be frothing? can't you be frothing? can't he be frothing? can't we be frothing? can't you be frothing? can't they be frothing?
Perfect	V-ing perfect
can't I have frothed? can't you have frothed? can't he have frothed? can't we have frothed? can't you have frothed? can't they have frothed?	can't I have been frothing? can't you have been frothing? can't he have been frothing? can't we have been frothing? can't you have been frothing? can't they have been frothing?