English verb conjugation
CAN STIR

Regular verb: stir - stirred - stirred

Affirmation

Simple form	V-ing form
I can stir you can stir he can stir we can stir you can stir they can stir	I can be stirring you can be stirring he can be stirring we can be stirring you can be stirring they can be stirring
Perfect	V-ing perfect
I can have stirred you can have stirred he can have stirred we can have stirred you can have stirred they can have stirred	I can have been stirring you can have been stirring he can have been stirring we can have been stirring you can have been stirring they can have been stirring

Negation

Simple form	V-ing form
I can't stir you can't stir he can't stir we can't stir you can't stir they can't stir	I can't be stirring you can't be stirring he can't be stirring we can't be stirring you can't be stirring they can't be stirring
Perfect	V-ing perfect
I can't have stirred you can't have stirred he can't have stirred we can't have stirred you can't have stirred they can't have stirred	I can't have been stirring you can't have been stirring he can't have been stirring we can't have been stirring you can't have been stirring they can't have been stirring

Interrogative form

Simple form	V-ing form
can I stir? can you stir? can he stir? can we stir? can you stir? can they stir?	can I be stirring? can you be stirring? can he be stirring? can we be stirring? can you be stirring? can they be stirring?
Perfect	V-ing perfect
can I have stirred? can you have stirred? can he have stirred? can we have stirred? can you have stirred? can they have stirred?	can I have been stirring? can you have been stirring? can he have been stirring? can we have been stirring? can you have been stirring? can they have been stirring?

Interro-negative form

Simple form	V-ing form
can't I stir? can't you stir? can't he stir? can't we stir? can't you stir? can't they stir?	can't I be stirring? can't you be stirring? can't he be stirring? can't we be stirring? can't you be stirring? can't they be stirring?
Perfect	V-ing perfect
can't I have stirred? can't you have stirred? can't he have stirred? can't we have stirred? can't you have stirred? can't they have stirred?	can't I have been stirring? can't you have been stirring? can't he have been stirring? can't we have been stirring? can't you have been stirring? can't they have been stirring?