English verb conjugation CAN INVESTIGATE

Regular verb: investigate - investigated - investigated

Affirmation

Simple form

I can investigate
you can investigate
he can investigate
we can investigate
you can investigate
they can investigate

V-ing form

I can be investigating
you can be investigating
he can be investigating
we can be investigating
you can be investigating
they can be investigating

Perfect

I can have investigated
you can have investigated
he can have investigated
we can have investigated
you can have investigated
they can have investigated

V-ing perfect

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

Negation

Simple form

I can't investigate
you can't investigate
he can't investigate
we can't investigate
you can't investigate
they can't investigate

V-ing form

I can't be investigating
you can't be investigating
he can't be investigating
we can't be investigating
you can't be investigating
they can't be investigating

Perfect

I can't have investigated
you can't have investigated
he can't have investigated
we can't have investigated
you can't have investigated
they can't have investigated

V-ing perfect

I can't have been investigating
you can't have been investigating
he can't have been investigating
we can't have been investigating
you can't have been investigating
they can't have been investigating

Interrogative form

Simple form

can I investigate?
can you investigate?
can he investigate?
can we investigate?
can you investigate?
can they investigate?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

can't I investigate?
can't you investigate?
can't he investigate?
can't we investigate?
can't you investigate?
can't they investigate?

V-ing form

can't I be investigating?
can't you be investigating?
can't he be investigating?
can't we be investigating?
can't you be investigating?
can't they be investigating?

Perfect

can't I have investigated?
can't you have investigated?
can't he have investigated?
can't we have investigated?
can't you have investigated?
can't they have investigated?

V-ing perfect

can't I have been investigating?
can't you have been investigating?
can't he have been investigating?
can't we have been investigating?
can't you have been investigating?
can't they have been investigating?

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