English verb conjugation
COULD STURDY

Regular verb: sturdy - sturdied - sturdied

Affirmation

Simple form	V-ing form
I could sturdy you could sturdy he could sturdy we could sturdy you could sturdy they could sturdy	I could be sturdying you could be sturdying he could be sturdying we could be sturdying you could be sturdying they could be sturdying
Perfect	V-ing perfect
I could have sturdied you could have sturdied he could have sturdied we could have sturdied you could have sturdied they could have sturdied	I could have been sturdying you could have been sturdying he could have been sturdying we could have been sturdying you could have been sturdying they could have been sturdying

Negation

Simple form	V-ing form
I couldn't sturdy you couldn't sturdy he couldn't sturdy we couldn't sturdy you couldn't sturdy they couldn't sturdy	I couldn't be sturdying you couldn't be sturdying he couldn't be sturdying we couldn't be sturdying you couldn't be sturdying they couldn't be sturdying
Perfect	V-ing perfect
I couldn't have sturdied you couldn't have sturdied he couldn't have sturdied we couldn't have sturdied you couldn't have sturdied they couldn't have sturdied	I couldn't have been sturdying you couldn't have been sturdying he couldn't have been sturdying we couldn't have been sturdying you couldn't have been sturdying they couldn't have been sturdying

Interrogative form

Simple form	V-ing form
could I sturdy? could you sturdy? could he sturdy? could we sturdy? could you sturdy? could they sturdy?	could I be sturdying? could you be sturdying? could he be sturdying? could we be sturdying? could you be sturdying? could they be sturdying?
Perfect	V-ing perfect
could I have sturdied? could you have sturdied? could he have sturdied? could we have sturdied? could you have sturdied? could they have sturdied?	could I have been sturdying? could you have been sturdying? could he have been sturdying? could we have been sturdying? could you have been sturdying? could they have been sturdying?

Interro-negative form

Simple form	V-ing form
couldn't I sturdy? couldn't you sturdy? couldn't he sturdy? couldn't we sturdy? couldn't you sturdy? couldn't they sturdy?	couldn't I be sturdying? couldn't you be sturdying? couldn't he be sturdying? couldn't we be sturdying? couldn't you be sturdying? couldn't they be sturdying?
Perfect	V-ing perfect
couldn't I have sturdied? couldn't you have sturdied? couldn't he have sturdied? couldn't we have sturdied? couldn't you have sturdied? couldn't they have sturdied?	couldn't I have been sturdying? couldn't you have been sturdying? couldn't he have been sturdying? couldn't we have been sturdying? couldn't you have been sturdying? couldn't they have been sturdying?