English verb conjugation
CAN UNTHREAD

Regular verb: unthread - unthreaded - unthreaded

Affirmation

Simple form	V-ing form
I can unthread you can unthread he can unthread we can unthread you can unthread they can unthread	I can be unthreading you can be unthreading he can be unthreading we can be unthreading you can be unthreading they can be unthreading
Perfect	V-ing perfect
I can have unthreaded you can have unthreaded he can have unthreaded we can have unthreaded you can have unthreaded they can have unthreaded	I can have been unthreading you can have been unthreading he can have been unthreading we can have been unthreading you can have been unthreading they can have been unthreading

Negation

Simple form	V-ing form
I can't unthread you can't unthread he can't unthread we can't unthread you can't unthread they can't unthread	I can't be unthreading you can't be unthreading he can't be unthreading we can't be unthreading you can't be unthreading they can't be unthreading
Perfect	V-ing perfect
I can't have unthreaded you can't have unthreaded he can't have unthreaded we can't have unthreaded you can't have unthreaded they can't have unthreaded	I can't have been unthreading you can't have been unthreading he can't have been unthreading we can't have been unthreading you can't have been unthreading they can't have been unthreading

Interrogative form

Simple form	V-ing form
can I unthread? can you unthread? can he unthread? can we unthread? can you unthread? can they unthread?	can I be unthreading? can you be unthreading? can he be unthreading? can we be unthreading? can you be unthreading? can they be unthreading?
Perfect	V-ing perfect
can I have unthreaded? can you have unthreaded? can he have unthreaded? can we have unthreaded? can you have unthreaded? can they have unthreaded?	can I have been unthreading? can you have been unthreading? can he have been unthreading? can we have been unthreading? can you have been unthreading? can they have been unthreading?

Interro-negative form

Simple form	V-ing form
can't I unthread? can't you unthread? can't he unthread? can't we unthread? can't you unthread? can't they unthread?	can't I be unthreading? can't you be unthreading? can't he be unthreading? can't we be unthreading? can't you be unthreading? can't they be unthreading?
Perfect	V-ing perfect
can't I have unthreaded? can't you have unthreaded? can't he have unthreaded? can't we have unthreaded? can't you have unthreaded? can't they have unthreaded?	can't I have been unthreading? can't you have been unthreading? can't he have been unthreading? can't we have been unthreading? can't you have been unthreading? can't they have been unthreading?