I can backdate you can backdate he can backdate we can backdate you can backdate they can backdate
Forma con V-ing
I can be backdating you can be backdating he can be backdating we can be backdating you can be backdating they can be backdating
Perfecto
I can have backdated you can have backdated he can have backdated we can have backdated you can have backdated they can have backdated
Perfecto con V-ing
I can have been backdating you can have been backdating he can have been backdating we can have been backdating you can have been backdating they can have been backdating
Negación
Forma simple
I can't backdate you can't backdate he can't backdate we can't backdate you can't backdate they can't backdate
Forma con V-ing
I can't be backdating you can't be backdating he can't be backdating we can't be backdating you can't be backdating they can't be backdating
Perfecto
I can't have backdated you can't have backdated he can't have backdated we can't have backdated you can't have backdated they can't have backdated
Perfecto con V-ing
I can't have been backdating you can't have been backdating he can't have been backdating we can't have been backdating you can't have been backdating they can't have been backdating
Forma interrogativa
Forma simple
can I backdate? can you backdate? can he backdate? can we backdate? can you backdate? can they backdate?
Forma con V-ing
can I be backdating? can you be backdating? can he be backdating? can we be backdating? can you be backdating? can they be backdating?
Perfecto
can I have backdated? can you have backdated? can he have backdated? can we have backdated? can you have backdated? can they have backdated?
Perfecto con V-ing
can I have been backdating? can you have been backdating? can he have been backdating? can we have been backdating? can you have been backdating? can they have been backdating?
Forma interro-negativa
Forma simple
can't I backdate? can't you backdate? can't he backdate? can't we backdate? can't you backdate? can't they backdate?
Forma con V-ing
can't I be backdating? can't you be backdating? can't he be backdating? can't we be backdating? can't you be backdating? can't they be backdating?
Perfecto
can't I have backdated? can't you have backdated? can't he have backdated? can't we have backdated? can't you have backdated? can't they have backdated?
Perfecto con V-ing
can't I have been backdating? can't you have been backdating? can't he have been backdating? can't we have been backdating? can't you have been backdating? can't they have been backdating?