I can witness you can witness she can witness we can witness you can witness they can witness
Forma com V-ing
I can be witnessing you can be witnessing she can be witnessing we can be witnessing you can be witnessing they can be witnessing
Perfeito
I can have witnessed you can have witnessed she can have witnessed we can have witnessed you can have witnessed they can have witnessed
Perfeito com V-ing
I can have been witnessing you can have been witnessing she can have been witnessing we can have been witnessing you can have been witnessing they can have been witnessing
Negação
Forma simple
I cannot witness you cannot witness she cannot witness we cannot witness you cannot witness they cannot witness
Forma com V-ing
I cannot be witnessing you cannot be witnessing she cannot be witnessing we cannot be witnessing you cannot be witnessing they cannot be witnessing
Perfeito
I cannot have witnessed you cannot have witnessed she cannot have witnessed we cannot have witnessed you cannot have witnessed they cannot have witnessed
Perfeito com V-ing
I cannot have been witnessing you cannot have been witnessing she cannot have been witnessing we cannot have been witnessing you cannot have been witnessing they cannot have been witnessing
Forma interrogativa
Forma simple
can I witness? can you witness? can she witness? can we witness? can you witness? can they witness?
Forma com V-ing
can I be witnessing? can you be witnessing? can she be witnessing? can we be witnessing? can you be witnessing? can they be witnessing?
Perfeito
can I have witnessed? can you have witnessed? can she have witnessed? can we have witnessed? can you have witnessed? can they have witnessed?
Perfeito com V-ing
can I have been witnessing? can you have been witnessing? can she have been witnessing? can we have been witnessing? can you have been witnessing? can they have been witnessing?
Forma interro-Negação
Forma simple
can I not witness? can you not witness? can she not witness? can we not witness? can you not witness? can they not witness?
Forma com V-ing
can I not be witnessing? can you not be witnessing? can she not be witnessing? can we not be witnessing? can you not be witnessing? can they not be witnessing?
Perfeito
can I not have witnessed? can you not have witnessed? can she not have witnessed? can we not have witnessed? can you not have witnessed? can they not have witnessed?
Perfeito com V-ing
can I not have been witnessing? can you not have been witnessing? can she not have been witnessing? can we not have been witnessing? can you not have been witnessing? can they not have been witnessing?