English verb conjugation
COULD THATCH

Regular verb: thatch - thatched - thatched

Affirmation

Simple form	V-ing form
I could thatch you could thatch he could thatch we could thatch you could thatch they could thatch	I could be thatching you could be thatching he could be thatching we could be thatching you could be thatching they could be thatching
Perfect	V-ing perfect
I could have thatched you could have thatched he could have thatched we could have thatched you could have thatched they could have thatched	I could have been thatching you could have been thatching he could have been thatching we could have been thatching you could have been thatching they could have been thatching

Negation

Simple form	V-ing form
I could not thatch you could not thatch he could not thatch we could not thatch you could not thatch they could not thatch	I could not be thatching you could not be thatching he could not be thatching we could not be thatching you could not be thatching they could not be thatching
Perfect	V-ing perfect
I could not have thatched you could not have thatched he could not have thatched we could not have thatched you could not have thatched they could not have thatched	I could not have been thatching you could not have been thatching he could not have been thatching we could not have been thatching you could not have been thatching they could not have been thatching

Interrogative form

Simple form	V-ing form
could I thatch? could you thatch? could he thatch? could we thatch? could you thatch? could they thatch?	could I be thatching? could you be thatching? could he be thatching? could we be thatching? could you be thatching? could they be thatching?
Perfect	V-ing perfect
could I have thatched? could you have thatched? could he have thatched? could we have thatched? could you have thatched? could they have thatched?	could I have been thatching? could you have been thatching? could he have been thatching? could we have been thatching? could you have been thatching? could they have been thatching?

Interro-negative form

Simple form	V-ing form
could I not thatch? could you not thatch? could he not thatch? could we not thatch? could you not thatch? could they not thatch?	could I not be thatching? could you not be thatching? could he not be thatching? could we not be thatching? could you not be thatching? could they not be thatching?
Perfect	V-ing perfect
could I not have thatched? could you not have thatched? could he not have thatched? could we not have thatched? could you not have thatched? could they not have thatched?	could I not have been thatching? could you not have been thatching? could he not have been thatching? could we not have been thatching? could you not have been thatching? could they not have been thatching?