I could thank you could thank he could thank we could thank you could thank they could thank
Forma com V-ing
I could be thanking you could be thanking he could be thanking we could be thanking you could be thanking they could be thanking
Perfeito
I could have thanked you could have thanked he could have thanked we could have thanked you could have thanked they could have thanked
Perfeito com V-ing
I could have been thanking you could have been thanking he could have been thanking we could have been thanking you could have been thanking they could have been thanking
Negação
Forma simple
I could not thank you could not thank he could not thank we could not thank you could not thank they could not thank
Forma com V-ing
I could not be thanking you could not be thanking he could not be thanking we could not be thanking you could not be thanking they could not be thanking
Perfeito
I could not have thanked you could not have thanked he could not have thanked we could not have thanked you could not have thanked they could not have thanked
Perfeito com V-ing
I could not have been thanking you could not have been thanking he could not have been thanking we could not have been thanking you could not have been thanking they could not have been thanking
Forma interrogativa
Forma simple
could I thank? could you thank? could he thank? could we thank? could you thank? could they thank?
Forma com V-ing
could I be thanking? could you be thanking? could he be thanking? could we be thanking? could you be thanking? could they be thanking?
Perfeito
could I have thanked? could you have thanked? could he have thanked? could we have thanked? could you have thanked? could they have thanked?
Perfeito com V-ing
could I have been thanking? could you have been thanking? could he have been thanking? could we have been thanking? could you have been thanking? could they have been thanking?
Forma interro-Negação
Forma simple
could I not thank? could you not thank? could he not thank? could we not thank? could you not thank? could they not thank?
Forma com V-ing
could I not be thanking? could you not be thanking? could he not be thanking? could we not be thanking? could you not be thanking? could they not be thanking?
Perfeito
could I not have thanked? could you not have thanked? could he not have thanked? could we not have thanked? could you not have thanked? could they not have thanked?
Perfeito com V-ing
could I not have been thanking? could you not have been thanking? could he not have been thanking? could we not have been thanking? could you not have been thanking? could they not have been thanking?