Conjugación del verbo inglés
COULD SPAR

Verbo regular: spar - sparred - sparred

Afirmación

Forma simple	Forma con V-ing
I could spar you could spar she could spar we could spar you could spar they could spar	I could be sparring you could be sparring she could be sparring we could be sparring you could be sparring they could be sparring
Perfecto	Perfecto con V-ing
I could have sparred you could have sparred she could have sparred we could have sparred you could have sparred they could have sparred	I could have been sparring you could have been sparring she could have been sparring we could have been sparring you could have been sparring they could have been sparring

Negación

Forma simple	Forma con V-ing
I couldn't spar you couldn't spar she couldn't spar we couldn't spar you couldn't spar they couldn't spar	I couldn't be sparring you couldn't be sparring she couldn't be sparring we couldn't be sparring you couldn't be sparring they couldn't be sparring
Perfecto	Perfecto con V-ing
I couldn't have sparred you couldn't have sparred she couldn't have sparred we couldn't have sparred you couldn't have sparred they couldn't have sparred	I couldn't have been sparring you couldn't have been sparring she couldn't have been sparring we couldn't have been sparring you couldn't have been sparring they couldn't have been sparring

Forma interrogativa

Forma simple	Forma con V-ing
could I spar? could you spar? could she spar? could we spar? could you spar? could they spar?	could I be sparring? could you be sparring? could she be sparring? could we be sparring? could you be sparring? could they be sparring?
Perfecto	Perfecto con V-ing
could I have sparred? could you have sparred? could she have sparred? could we have sparred? could you have sparred? could they have sparred?	could I have been sparring? could you have been sparring? could she have been sparring? could we have been sparring? could you have been sparring? could they have been sparring?

Forma interro-negativa

Forma simple	Forma con V-ing
couldn't I spar? couldn't you spar? couldn't she spar? couldn't we spar? couldn't you spar? couldn't they spar?	couldn't I be sparring? couldn't you be sparring? couldn't she be sparring? couldn't we be sparring? couldn't you be sparring? couldn't they be sparring?
Perfecto	Perfecto con V-ing
couldn't I have sparred? couldn't you have sparred? couldn't she have sparred? couldn't we have sparred? couldn't you have sparred? couldn't they have sparred?	couldn't I have been sparring? couldn't you have been sparring? couldn't she have been sparring? couldn't we have been sparring? couldn't you have been sparring? couldn't they have been sparring?