I can throb you can throb he can throb we can throb you can throb they can throb
Forma con V-ing
I can be throbbing you can be throbbing he can be throbbing we can be throbbing you can be throbbing they can be throbbing
Perfecto
I can have throbbed you can have throbbed he can have throbbed we can have throbbed you can have throbbed they can have throbbed
Perfecto con V-ing
I can have been throbbing you can have been throbbing he can have been throbbing we can have been throbbing you can have been throbbing they can have been throbbing
Negación
Forma simple
I cannot throb you cannot throb he cannot throb we cannot throb you cannot throb they cannot throb
Forma con V-ing
I cannot be throbbing you cannot be throbbing he cannot be throbbing we cannot be throbbing you cannot be throbbing they cannot be throbbing
Perfecto
I cannot have throbbed you cannot have throbbed he cannot have throbbed we cannot have throbbed you cannot have throbbed they cannot have throbbed
Perfecto con V-ing
I cannot have been throbbing you cannot have been throbbing he cannot have been throbbing we cannot have been throbbing you cannot have been throbbing they cannot have been throbbing
Forma interrogativa
Forma simple
can I throb? can you throb? can he throb? can we throb? can you throb? can they throb?
Forma con V-ing
can I be throbbing? can you be throbbing? can he be throbbing? can we be throbbing? can you be throbbing? can they be throbbing?
Perfecto
can I have throbbed? can you have throbbed? can he have throbbed? can we have throbbed? can you have throbbed? can they have throbbed?
Perfecto con V-ing
can I have been throbbing? can you have been throbbing? can he have been throbbing? can we have been throbbing? can you have been throbbing? can they have been throbbing?
Forma interro-negativa
Forma simple
can I not throb? can you not throb? can he not throb? can we not throb? can you not throb? can they not throb?
Forma con V-ing
can I not be throbbing? can you not be throbbing? can he not be throbbing? can we not be throbbing? can you not be throbbing? can they not be throbbing?
Perfecto
can I not have throbbed? can you not have throbbed? can he not have throbbed? can we not have throbbed? can you not have throbbed? can they not have throbbed?
Perfecto con V-ing
can I not have been throbbing? can you not have been throbbing? can he not have been throbbing? can we not have been throbbing? can you not have been throbbing? can they not have been throbbing?