I can backdate you can backdate he can backdate we can backdate you can backdate they can backdate
Forma com 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
Perfeito
I can have backdated you can have backdated he can have backdated we can have backdated you can have backdated they can have backdated
Perfeito com 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
Negação
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 com 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
Perfeito
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
Perfeito com 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 com 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?
Perfeito
can I have backdated? can you have backdated? can he have backdated? can we have backdated? can you have backdated? can they have backdated?
Perfeito com 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-Negação
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 com 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?
Perfeito
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?
Perfeito com 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?