Conjugação do verbo inglês
COULD YELL

Verbo regular: yell - yelled - yelled

Afirmação

Forma simple	Forma com V-ing
I could yell you could yell he could yell we could yell you could yell they could yell	I could be yelling you could be yelling he could be yelling we could be yelling you could be yelling they could be yelling
Perfeito	Perfeito com V-ing
I could have yelled you could have yelled he could have yelled we could have yelled you could have yelled they could have yelled	I could have been yelling you could have been yelling he could have been yelling we could have been yelling you could have been yelling they could have been yelling

Negação

Forma simple	Forma com V-ing
I couldn't yell you couldn't yell he couldn't yell we couldn't yell you couldn't yell they couldn't yell	I couldn't be yelling you couldn't be yelling he couldn't be yelling we couldn't be yelling you couldn't be yelling they couldn't be yelling
Perfeito	Perfeito com V-ing
I couldn't have yelled you couldn't have yelled he couldn't have yelled we couldn't have yelled you couldn't have yelled they couldn't have yelled	I couldn't have been yelling you couldn't have been yelling he couldn't have been yelling we couldn't have been yelling you couldn't have been yelling they couldn't have been yelling

Forma interrogativa

Forma simple	Forma com V-ing
could I yell? could you yell? could he yell? could we yell? could you yell? could they yell?	could I be yelling? could you be yelling? could he be yelling? could we be yelling? could you be yelling? could they be yelling?
Perfeito	Perfeito com V-ing
could I have yelled? could you have yelled? could he have yelled? could we have yelled? could you have yelled? could they have yelled?	could I have been yelling? could you have been yelling? could he have been yelling? could we have been yelling? could you have been yelling? could they have been yelling?

Forma interro-Negação

Forma simple	Forma com V-ing
couldn't I yell? couldn't you yell? couldn't he yell? couldn't we yell? couldn't you yell? couldn't they yell?	couldn't I be yelling? couldn't you be yelling? couldn't he be yelling? couldn't we be yelling? couldn't you be yelling? couldn't they be yelling?
Perfeito	Perfeito com V-ing
couldn't I have yelled? couldn't you have yelled? couldn't he have yelled? couldn't we have yelled? couldn't you have yelled? couldn't they have yelled?	couldn't I have been yelling? couldn't you have been yelling? couldn't he have been yelling? couldn't we have been yelling? couldn't you have been yelling? couldn't they have been yelling?