English verb conjugation CAN OBSERVE

Regular verb: observe - observed - observed

Affirmation

Simple form

I can observe
you can observe
he can observe
we can observe
you can observe
they can observe

V-ing form

I can be observing
you can be observing
he can be observing
we can be observing
you can be observing
they can be observing

Perfect

I can have observed
you can have observed
he can have observed
we can have observed
you can have observed
they can have observed

V-ing perfect

I can have been observing
you can have been observing
he can have been observing
we can have been observing
you can have been observing
they can have been observing

Negation

Simple form

I cannot observe
you cannot observe
he cannot observe
we cannot observe
you cannot observe
they cannot observe

V-ing form

I cannot be observing
you cannot be observing
he cannot be observing
we cannot be observing
you cannot be observing
they cannot be observing

Perfect

I cannot have observed
you cannot have observed
he cannot have observed
we cannot have observed
you cannot have observed
they cannot have observed

V-ing perfect

I cannot have been observing
you cannot have been observing
he cannot have been observing
we cannot have been observing
you cannot have been observing
they cannot have been observing

Interrogative form

Simple form

can I observe?
can you observe?
can he observe?
can we observe?
can you observe?
can they observe?

V-ing form

can I be observing?
can you be observing?
can he be observing?
can we be observing?
can you be observing?
can they be observing?

Perfect

can I have observed?
can you have observed?
can he have observed?
can we have observed?
can you have observed?
can they have observed?

V-ing perfect

can I have been observing?
can you have been observing?
can he have been observing?
can we have been observing?
can you have been observing?
can they have been observing?

Interro-negative form

Simple form

can I not observe?
can you not observe?
can he not observe?
can we not observe?
can you not observe?
can they not observe?

V-ing form

can I not be observing?
can you not be observing?
can he not be observing?
can we not be observing?
can you not be observing?
can they not be observing?

Perfect

can I not have observed?
can you not have observed?
can he not have observed?
can we not have observed?
can you not have observed?
can they not have observed?

V-ing perfect

can I not have been observing?
can you not have been observing?
can he not have been observing?
can we not have been observing?
can you not have been observing?
can they not have been observing?

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