English verb conjugation CAN OBSERVE

Regular verb: observe - observed - observed

Affirmation

Simple form

I can observe
you can observe
she can observe
we can observe
you can observe
they can observe

V-ing form

I can be observing
you can be observing
she can be observing
we can be observing
you can be observing
they can be observing

Perfect

I can have observed
you can have observed
she 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
she can have been observing
we can have been observing
you can have been observing
they can have been observing

Negation

Simple form

I can't observe
you can't observe
she can't observe
we can't observe
you can't observe
they can't observe

V-ing form

I can't be observing
you can't be observing
she can't be observing
we can't be observing
you can't be observing
they can't be observing

Perfect

I can't have observed
you can't have observed
she can't have observed
we can't have observed
you can't have observed
they can't have observed

V-ing perfect

I can't have been observing
you can't have been observing
she can't have been observing
we can't have been observing
you can't have been observing
they can't have been observing

Interrogative form

Simple form

can I observe?
can you observe?
can she observe?
can we observe?
can you observe?
can they observe?

V-ing form

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

Perfect

can I have observed?
can you have observed?
can she 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 she have been observing?
can we have been observing?
can you have been observing?
can they have been observing?

Interro-negative form

Simple form

can't I observe?
can't you observe?
can't she observe?
can't we observe?
can't you observe?
can't they observe?

V-ing form

can't I be observing?
can't you be observing?
can't she be observing?
can't we be observing?
can't you be observing?
can't they be observing?

Perfect

can't I have observed?
can't you have observed?
can't she have observed?
can't we have observed?
can't you have observed?
can't they have observed?

V-ing perfect

can't I have been observing?
can't you have been observing?
can't she have been observing?
can't we have been observing?
can't you have been observing?
can't they have been observing?

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