female gender | Modal : no | may | might | can | could | shall | should | will | would | must | ought to
English verb conjugation COULD RUB
Regular verb: rub - rubbed - rubbed
Affirmation
Simple form
I could rubyou could rub
he could rub
we could rub
you could rub
they could rub
V-ing form
I could be rubbingyou could be rubbing
he could be rubbing
we could be rubbing
you could be rubbing
they could be rubbing
Perfect
I could have rubbedyou could have rubbed
he could have rubbed
we could have rubbed
you could have rubbed
they could have rubbed
V-ing perfect
I could have been rubbingyou could have been rubbing
he could have been rubbing
we could have been rubbing
you could have been rubbing
they could have been rubbing
Negation
Simple form
I couldn't rubyou couldn't rub
he couldn't rub
we couldn't rub
you couldn't rub
they couldn't rub
V-ing form
I couldn't be rubbingyou couldn't be rubbing
he couldn't be rubbing
we couldn't be rubbing
you couldn't be rubbing
they couldn't be rubbing
Perfect
I couldn't have rubbedyou couldn't have rubbed
he couldn't have rubbed
we couldn't have rubbed
you couldn't have rubbed
they couldn't have rubbed
V-ing perfect
I couldn't have been rubbingyou couldn't have been rubbing
he couldn't have been rubbing
we couldn't have been rubbing
you couldn't have been rubbing
they couldn't have been rubbing
Interrogative form
Simple form
could I rub?could you rub?
could he rub?
could we rub?
could you rub?
could they rub?
V-ing form
could I be rubbing?could you be rubbing?
could he be rubbing?
could we be rubbing?
could you be rubbing?
could they be rubbing?
Perfect
could I have rubbed?could you have rubbed?
could he have rubbed?
could we have rubbed?
could you have rubbed?
could they have rubbed?
V-ing perfect
could I have been rubbing?could you have been rubbing?
could he have been rubbing?
could we have been rubbing?
could you have been rubbing?
could they have been rubbing?
Interro-negative form
Simple form
couldn't I rub?couldn't you rub?
couldn't he rub?
couldn't we rub?
couldn't you rub?
couldn't they rub?
V-ing form
couldn't I be rubbing?couldn't you be rubbing?
couldn't he be rubbing?
couldn't we be rubbing?
couldn't you be rubbing?
couldn't they be rubbing?
Perfect
couldn't I have rubbed?couldn't you have rubbed?
couldn't he have rubbed?
couldn't we have rubbed?
couldn't you have rubbed?
couldn't they have rubbed?
V-ing perfect
couldn't I have been rubbing?couldn't you have been rubbing?
couldn't he have been rubbing?
couldn't we have been rubbing?
couldn't you have been rubbing?
couldn't they have been rubbing?