English verb conjugation
COULD THATCH

Regular verb: thatch - thatched - thatched

Affirmation

Simple form	V-ing form
I could thatch you could thatch she could thatch we could thatch you could thatch they could thatch	I could be thatching you could be thatching she 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 she 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 she 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 couldn't thatch you couldn't thatch she couldn't thatch we couldn't thatch you couldn't thatch they couldn't thatch	I couldn't be thatching you couldn't be thatching she couldn't be thatching we couldn't be thatching you couldn't be thatching they couldn't be thatching
Perfect	V-ing perfect
I couldn't have thatched you couldn't have thatched she couldn't have thatched we couldn't have thatched you couldn't have thatched they couldn't have thatched	I couldn't have been thatching you couldn't have been thatching she couldn't have been thatching we couldn't have been thatching you couldn't have been thatching they couldn't have been thatching

Interrogative form

Simple form	V-ing form
could I thatch? could you thatch? could she thatch? could we thatch? could you thatch? could they thatch?	could I be thatching? could you be thatching? could she 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 she 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 she 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
couldn't I thatch? couldn't you thatch? couldn't she thatch? couldn't we thatch? couldn't you thatch? couldn't they thatch?	couldn't I be thatching? couldn't you be thatching? couldn't she be thatching? couldn't we be thatching? couldn't you be thatching? couldn't they be thatching?
Perfect	V-ing perfect
couldn't I have thatched? couldn't you have thatched? couldn't she have thatched? couldn't we have thatched? couldn't you have thatched? couldn't they have thatched?	couldn't I have been thatching? couldn't you have been thatching? couldn't she have been thatching? couldn't we have been thatching? couldn't you have been thatching? couldn't they have been thatching?