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 cannot investigate
you cannot investigate
he cannot investigate
we cannot investigate
you cannot investigate
they cannot investigate

V-ing form

I cannot be investigating
you cannot be investigating
he cannot be investigating
we cannot be investigating
you cannot be investigating
they cannot be investigating

Perfect

I cannot have investigated
you cannot have investigated
he cannot have investigated
we cannot have investigated
you cannot have investigated
they cannot have investigated

V-ing perfect

I cannot have been investigating
you cannot have been investigating
he cannot have been investigating
we cannot have been investigating
you cannot have been investigating
they cannot 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 I not investigate?
can you not investigate?
can he not investigate?
can we not investigate?
can you not investigate?
can they not investigate?

V-ing form

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

Perfect

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

V-ing perfect

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

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