Conjugación del verbo inglés
COULD GRIEVE

Verbo regular: grieve - grieved - grieved

Afirmación

Forma simple	Forma con V-ing
I could grieve you could grieve he could grieve we could grieve you could grieve they could grieve	I could be grieving you could be grieving he could be grieving we could be grieving you could be grieving they could be grieving
Perfecto	Perfecto con V-ing
I could have grieved you could have grieved he could have grieved we could have grieved you could have grieved they could have grieved	I could have been grieving you could have been grieving he could have been grieving we could have been grieving you could have been grieving they could have been grieving

Negación

Forma simple	Forma con V-ing
I couldn't grieve you couldn't grieve he couldn't grieve we couldn't grieve you couldn't grieve they couldn't grieve	I couldn't be grieving you couldn't be grieving he couldn't be grieving we couldn't be grieving you couldn't be grieving they couldn't be grieving
Perfecto	Perfecto con V-ing
I couldn't have grieved you couldn't have grieved he couldn't have grieved we couldn't have grieved you couldn't have grieved they couldn't have grieved	I couldn't have been grieving you couldn't have been grieving he couldn't have been grieving we couldn't have been grieving you couldn't have been grieving they couldn't have been grieving

Forma interrogativa

Forma simple	Forma con V-ing
could I grieve? could you grieve? could he grieve? could we grieve? could you grieve? could they grieve?	could I be grieving? could you be grieving? could he be grieving? could we be grieving? could you be grieving? could they be grieving?
Perfecto	Perfecto con V-ing
could I have grieved? could you have grieved? could he have grieved? could we have grieved? could you have grieved? could they have grieved?	could I have been grieving? could you have been grieving? could he have been grieving? could we have been grieving? could you have been grieving? could they have been grieving?

Forma interro-negativa

Forma simple	Forma con V-ing
couldn't I grieve? couldn't you grieve? couldn't he grieve? couldn't we grieve? couldn't you grieve? couldn't they grieve?	couldn't I be grieving? couldn't you be grieving? couldn't he be grieving? couldn't we be grieving? couldn't you be grieving? couldn't they be grieving?
Perfecto	Perfecto con V-ing
couldn't I have grieved? couldn't you have grieved? couldn't he have grieved? couldn't we have grieved? couldn't you have grieved? couldn't they have grieved?	couldn't I have been grieving? couldn't you have been grieving? couldn't he have been grieving? couldn't we have been grieving? couldn't you have been grieving? couldn't they have been grieving?