Verbo regular: ascertain - ascertained - ascertained
Afirmación
Forma simple
I can ascertain you can ascertain she can ascertain we can ascertain you can ascertain they can ascertain
Forma con V-ing
I can be ascertaining you can be ascertaining she can be ascertaining we can be ascertaining you can be ascertaining they can be ascertaining
Perfecto
I can have ascertained you can have ascertained she can have ascertained we can have ascertained you can have ascertained they can have ascertained
Perfecto con V-ing
I can have been ascertaining you can have been ascertaining she can have been ascertaining we can have been ascertaining you can have been ascertaining they can have been ascertaining
Negación
Forma simple
I can't ascertain you can't ascertain she can't ascertain we can't ascertain you can't ascertain they can't ascertain
Forma con V-ing
I can't be ascertaining you can't be ascertaining she can't be ascertaining we can't be ascertaining you can't be ascertaining they can't be ascertaining
Perfecto
I can't have ascertained you can't have ascertained she can't have ascertained we can't have ascertained you can't have ascertained they can't have ascertained
Perfecto con V-ing
I can't have been ascertaining you can't have been ascertaining she can't have been ascertaining we can't have been ascertaining you can't have been ascertaining they can't have been ascertaining
Forma interrogativa
Forma simple
can I ascertain? can you ascertain? can she ascertain? can we ascertain? can you ascertain? can they ascertain?
Forma con V-ing
can I be ascertaining? can you be ascertaining? can she be ascertaining? can we be ascertaining? can you be ascertaining? can they be ascertaining?
Perfecto
can I have ascertained? can you have ascertained? can she have ascertained? can we have ascertained? can you have ascertained? can they have ascertained?
Perfecto con V-ing
can I have been ascertaining? can you have been ascertaining? can she have been ascertaining? can we have been ascertaining? can you have been ascertaining? can they have been ascertaining?
Forma interro-negativa
Forma simple
can't I ascertain? can't you ascertain? can't she ascertain? can't we ascertain? can't you ascertain? can't they ascertain?
Forma con V-ing
can't I be ascertaining? can't you be ascertaining? can't she be ascertaining? can't we be ascertaining? can't you be ascertaining? can't they be ascertaining?
Perfecto
can't I have ascertained? can't you have ascertained? can't she have ascertained? can't we have ascertained? can't you have ascertained? can't they have ascertained?
Perfecto con V-ing
can't I have been ascertaining? can't you have been ascertaining? can't she have been ascertaining? can't we have been ascertaining? can't you have been ascertaining? can't they have been ascertaining?