I can observe you can observe she can observe we can observe you can observe they can observe
Forma com V-ing
I can be observing you can be observing she can be observing we can be observing you can be observing they can be observing
Perfeito
I can have observed you can have observed she can have observed we can have observed you can have observed they can have observed
Perfeito com V-ing
I can have been observing you can have been observing she can have been observing we can have been observing you can have been observing they can have been observing
Negação
Forma simple
I cannot observe you cannot observe she cannot observe we cannot observe you cannot observe they cannot observe
Forma com V-ing
I cannot be observing you cannot be observing she cannot be observing we cannot be observing you cannot be observing they cannot be observing
Perfeito
I cannot have observed you cannot have observed she cannot have observed we cannot have observed you cannot have observed they cannot have observed
Perfeito com V-ing
I cannot have been observing you cannot have been observing she cannot have been observing we cannot have been observing you cannot have been observing they cannot have been observing
Forma interrogativa
Forma simple
can I observe? can you observe? can she observe? can we observe? can you observe? can they observe?
Forma com V-ing
can I be observing? can you be observing? can she be observing? can we be observing? can you be observing? can they be observing?
Perfeito
can I have observed? can you have observed? can she have observed? can we have observed? can you have observed? can they have observed?
Perfeito com V-ing
can I have been observing? can you have been observing? can she have been observing? can we have been observing? can you have been observing? can they have been observing?
Forma interro-Negação
Forma simple
can I not observe? can you not observe? can she not observe? can we not observe? can you not observe? can they not observe?
Forma com V-ing
can I not be observing? can you not be observing? can she not be observing? can we not be observing? can you not be observing? can they not be observing?
Perfeito
can I not have observed? can you not have observed? can she not have observed? can we not have observed? can you not have observed? can they not have observed?
Perfeito com V-ing
can I not have been observing? can you not have been observing? can she not have been observing? can we not have been observing? can you not have been observing? can they not have been observing?