English verb conjugation
CAN SIT

Irregular verb: sit - sat - sat

Affirmation

Simple form	V-ing form
I can sit you can sit he can sit we can sit you can sit they can sit	I can be sitting you can be sitting he can be sitting we can be sitting you can be sitting they can be sitting
Perfect	V-ing perfect
I can have sat you can have sat he can have sat we can have sat you can have sat they can have sat	I can have been sitting you can have been sitting he can have been sitting we can have been sitting you can have been sitting they can have been sitting

Negation

Simple form	V-ing form
I can't sit you can't sit he can't sit we can't sit you can't sit they can't sit	I can't be sitting you can't be sitting he can't be sitting we can't be sitting you can't be sitting they can't be sitting
Perfect	V-ing perfect
I can't have sat you can't have sat he can't have sat we can't have sat you can't have sat they can't have sat	I can't have been sitting you can't have been sitting he can't have been sitting we can't have been sitting you can't have been sitting they can't have been sitting

Interrogative form

Simple form	V-ing form
can I sit? can you sit? can he sit? can we sit? can you sit? can they sit?	can I be sitting? can you be sitting? can he be sitting? can we be sitting? can you be sitting? can they be sitting?
Perfect	V-ing perfect
can I have sat? can you have sat? can he have sat? can we have sat? can you have sat? can they have sat?	can I have been sitting? can you have been sitting? can he have been sitting? can we have been sitting? can you have been sitting? can they have been sitting?

Interro-negative form

Simple form	V-ing form
can't I sit? can't you sit? can't he sit? can't we sit? can't you sit? can't they sit?	can't I be sitting? can't you be sitting? can't he be sitting? can't we be sitting? can't you be sitting? can't they be sitting?
Perfect	V-ing perfect
can't I have sat? can't you have sat? can't he have sat? can't we have sat? can't you have sat? can't they have sat?	can't I have been sitting? can't you have been sitting? can't he have been sitting? can't we have been sitting? can't you have been sitting? can't they have been sitting?