Conjugación del verbo inglés
COULD CONGRATULATE

Verbo regular: congratulate - congratulated - congratulated

Afirmación

Forma simple	Forma con V-ing
I could congratulate you could congratulate he could congratulate we could congratulate you could congratulate they could congratulate	I could be congratulating you could be congratulating he 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 he 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 he 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 couldn't congratulate you couldn't congratulate he couldn't congratulate we couldn't congratulate you couldn't congratulate they couldn't congratulate	I couldn't be congratulating you couldn't be congratulating he couldn't be congratulating we couldn't be congratulating you couldn't be congratulating they couldn't be congratulating
Perfecto	Perfecto con V-ing
I couldn't have congratulated you couldn't have congratulated he couldn't have congratulated we couldn't have congratulated you couldn't have congratulated they couldn't have congratulated	I couldn't have been congratulating you couldn't have been congratulating he couldn't have been congratulating we couldn't have been congratulating you couldn't have been congratulating they couldn't have been congratulating

Forma interrogativa

Forma simple	Forma con V-ing
could I congratulate? could you congratulate? could he congratulate? could we congratulate? could you congratulate? could they congratulate?	could I be congratulating? could you be congratulating? could he 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 he 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 he 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
couldn't I congratulate? couldn't you congratulate? couldn't he congratulate? couldn't we congratulate? couldn't you congratulate? couldn't they congratulate?	couldn't I be congratulating? couldn't you be congratulating? couldn't he be congratulating? couldn't we be congratulating? couldn't you be congratulating? couldn't they be congratulating?
Perfecto	Perfecto con V-ing
couldn't I have congratulated? couldn't you have congratulated? couldn't he have congratulated? couldn't we have congratulated? couldn't you have congratulated? couldn't they have congratulated?	couldn't I have been congratulating? couldn't you have been congratulating? couldn't he have been congratulating? couldn't we have been congratulating? couldn't you have been congratulating? couldn't they have been congratulating?