English verb conjugation COULD RICHEN

Regular verb: richen - richened - richened

Affirmation

Simple form

I could richen
you could richen
he could richen
we could richen
you could richen
they could richen

V-ing form

I could be richening
you could be richening
he could be richening
we could be richening
you could be richening
they could be richening

Perfect

I could have richened
you could have richened
he could have richened
we could have richened
you could have richened
they could have richened

V-ing perfect

I could have been richening
you could have been richening
he could have been richening
we could have been richening
you could have been richening
they could have been richening

Negation

Simple form

I could not richen
you could not richen
he could not richen
we could not richen
you could not richen
they could not richen

V-ing form

I could not be richening
you could not be richening
he could not be richening
we could not be richening
you could not be richening
they could not be richening

Perfect

I could not have richened
you could not have richened
he could not have richened
we could not have richened
you could not have richened
they could not have richened

V-ing perfect

I could not have been richening
you could not have been richening
he could not have been richening
we could not have been richening
you could not have been richening
they could not have been richening

Interrogative form

Simple form

could I richen?
could you richen?
could he richen?
could we richen?
could you richen?
could they richen?

V-ing form

could I be richening?
could you be richening?
could he be richening?
could we be richening?
could you be richening?
could they be richening?

Perfect

could I have richened?
could you have richened?
could he have richened?
could we have richened?
could you have richened?
could they have richened?

V-ing perfect

could I have been richening?
could you have been richening?
could he have been richening?
could we have been richening?
could you have been richening?
could they have been richening?

Interro-negative form

Simple form

could I not richen?
could you not richen?
could he not richen?
could we not richen?
could you not richen?
could they not richen?

V-ing form

could I not be richening?
could you not be richening?
could he not be richening?
could we not be richening?
could you not be richening?
could they not be richening?

Perfect

could I not have richened?
could you not have richened?
could he not have richened?
could we not have richened?
could you not have richened?
could they not have richened?

V-ing perfect

could I not have been richening?
could you not have been richening?
could he not have been richening?
could we not have been richening?
could you not have been richening?
could they not have been richening?

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