Conjugación del verbo inglés
COULD CONGRATULATE

Verbo regular: congratulate - congratulated - congratulated

Afirmación

Forma simple	Forma con V-ing
I could congratulate you could congratulate she could congratulate we could congratulate you could congratulate they could congratulate	I could be congratulating you could be congratulating she could be congratulating we could be congratulating you could be congratulating they could be congratulating
Perfecto	Perfecto con V-ing
I could have congratulated you could have congratulated she could have congratulated we could have congratulated you could have congratulated they could have congratulated	I could have been congratulating you could have been congratulating she could have been congratulating we could have been congratulating you could have been congratulating they could have been congratulating

Negación

Forma simple	Forma con V-ing
I could not congratulate you could not congratulate she could not congratulate we could not congratulate you could not congratulate they could not congratulate	I could not be congratulating you could not be congratulating she could not be congratulating we could not be congratulating you could not be congratulating they could not be congratulating
Perfecto	Perfecto con V-ing
I could not have congratulated you could not have congratulated she could not have congratulated we could not have congratulated you could not have congratulated they could not have congratulated	I could not have been congratulating you could not have been congratulating she could not have been congratulating we could not have been congratulating you could not have been congratulating they could not have been congratulating

Forma interrogativa

Forma simple	Forma con V-ing
could I congratulate? could you congratulate? could she congratulate? could we congratulate? could you congratulate? could they congratulate?	could I be congratulating? could you be congratulating? could she be congratulating? could we be congratulating? could you be congratulating? could they be congratulating?
Perfecto	Perfecto con V-ing
could I have congratulated? could you have congratulated? could she have congratulated? could we have congratulated? could you have congratulated? could they have congratulated?	could I have been congratulating? could you have been congratulating? could she have been congratulating? could we have been congratulating? could you have been congratulating? could they have been congratulating?

Forma interro-negativa

Forma simple	Forma con V-ing
could I not congratulate? could you not congratulate? could she not congratulate? could we not congratulate? could you not congratulate? could they not congratulate?	could I not be congratulating? could you not be congratulating? could she not be congratulating? could we not be congratulating? could you not be congratulating? could they not be congratulating?
Perfecto	Perfecto con V-ing
could I not have congratulated? could you not have congratulated? could she not have congratulated? could we not have congratulated? could you not have congratulated? could they not have congratulated?	could I not have been congratulating? could you not have been congratulating? could she not have been congratulating? could we not have been congratulating? could you not have been congratulating? could they not have been congratulating?