I could diagnose you could diagnose he could diagnose we could diagnose you could diagnose they could diagnose
Forma con V-ing
I could be diagnosing you could be diagnosing he could be diagnosing we could be diagnosing you could be diagnosing they could be diagnosing
Perfecto
I could have diagnosed you could have diagnosed he could have diagnosed we could have diagnosed you could have diagnosed they could have diagnosed
Perfecto con V-ing
I could have been diagnosing you could have been diagnosing he could have been diagnosing we could have been diagnosing you could have been diagnosing they could have been diagnosing
Negación
Forma simple
I couldn't diagnose you couldn't diagnose he couldn't diagnose we couldn't diagnose you couldn't diagnose they couldn't diagnose
Forma con V-ing
I couldn't be diagnosing you couldn't be diagnosing he couldn't be diagnosing we couldn't be diagnosing you couldn't be diagnosing they couldn't be diagnosing
Perfecto
I couldn't have diagnosed you couldn't have diagnosed he couldn't have diagnosed we couldn't have diagnosed you couldn't have diagnosed they couldn't have diagnosed
Perfecto con V-ing
I couldn't have been diagnosing you couldn't have been diagnosing he couldn't have been diagnosing we couldn't have been diagnosing you couldn't have been diagnosing they couldn't have been diagnosing
Forma interrogativa
Forma simple
could I diagnose? could you diagnose? could he diagnose? could we diagnose? could you diagnose? could they diagnose?
Forma con V-ing
could I be diagnosing? could you be diagnosing? could he be diagnosing? could we be diagnosing? could you be diagnosing? could they be diagnosing?
Perfecto
could I have diagnosed? could you have diagnosed? could he have diagnosed? could we have diagnosed? could you have diagnosed? could they have diagnosed?
Perfecto con V-ing
could I have been diagnosing? could you have been diagnosing? could he have been diagnosing? could we have been diagnosing? could you have been diagnosing? could they have been diagnosing?
Forma interro-negativa
Forma simple
couldn't I diagnose? couldn't you diagnose? couldn't he diagnose? couldn't we diagnose? couldn't you diagnose? couldn't they diagnose?
Forma con V-ing
couldn't I be diagnosing? couldn't you be diagnosing? couldn't he be diagnosing? couldn't we be diagnosing? couldn't you be diagnosing? couldn't they be diagnosing?
Perfecto
couldn't I have diagnosed? couldn't you have diagnosed? couldn't he have diagnosed? couldn't we have diagnosed? couldn't you have diagnosed? couldn't they have diagnosed?
Perfecto con V-ing
couldn't I have been diagnosing? couldn't you have been diagnosing? couldn't he have been diagnosing? couldn't we have been diagnosing? couldn't you have been diagnosing? couldn't they have been diagnosing?