Conjugación del verbo inglés
COULD TRILL

Verbo regular: trill - trilled - trilled

Afirmación

Forma simple	Forma con V-ing
I could trill you could trill he could trill we could trill you could trill they could trill	I could be trilling you could be trilling he could be trilling we could be trilling you could be trilling they could be trilling
Perfecto	Perfecto con V-ing
I could have trilled you could have trilled he could have trilled we could have trilled you could have trilled they could have trilled	I could have been trilling you could have been trilling he could have been trilling we could have been trilling you could have been trilling they could have been trilling

Negación

Forma simple	Forma con V-ing
I couldn't trill you couldn't trill he couldn't trill we couldn't trill you couldn't trill they couldn't trill	I couldn't be trilling you couldn't be trilling he couldn't be trilling we couldn't be trilling you couldn't be trilling they couldn't be trilling
Perfecto	Perfecto con V-ing
I couldn't have trilled you couldn't have trilled he couldn't have trilled we couldn't have trilled you couldn't have trilled they couldn't have trilled	I couldn't have been trilling you couldn't have been trilling he couldn't have been trilling we couldn't have been trilling you couldn't have been trilling they couldn't have been trilling

Forma interrogativa

Forma simple	Forma con V-ing
could I trill? could you trill? could he trill? could we trill? could you trill? could they trill?	could I be trilling? could you be trilling? could he be trilling? could we be trilling? could you be trilling? could they be trilling?
Perfecto	Perfecto con V-ing
could I have trilled? could you have trilled? could he have trilled? could we have trilled? could you have trilled? could they have trilled?	could I have been trilling? could you have been trilling? could he have been trilling? could we have been trilling? could you have been trilling? could they have been trilling?

Forma interro-negativa

Forma simple	Forma con V-ing
couldn't I trill? couldn't you trill? couldn't he trill? couldn't we trill? couldn't you trill? couldn't they trill?	couldn't I be trilling? couldn't you be trilling? couldn't he be trilling? couldn't we be trilling? couldn't you be trilling? couldn't they be trilling?
Perfecto	Perfecto con V-ing
couldn't I have trilled? couldn't you have trilled? couldn't he have trilled? couldn't we have trilled? couldn't you have trilled? couldn't they have trilled?	couldn't I have been trilling? couldn't you have been trilling? couldn't he have been trilling? couldn't we have been trilling? couldn't you have been trilling? couldn't they have been trilling?