English verb conjugation CAN ROOF

Regular verb: roof - roofed - roofed

Affirmation

Simple form

I can roof
you can roof
he can roof
we can roof
you can roof
they can roof

V-ing form

I can be roofing
you can be roofing
he can be roofing
we can be roofing
you can be roofing
they can be roofing

Perfect

I can have roofed
you can have roofed
he can have roofed
we can have roofed
you can have roofed
they can have roofed

V-ing perfect

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

Negation

Simple form

I cannot roof
you cannot roof
he cannot roof
we cannot roof
you cannot roof
they cannot roof

V-ing form

I cannot be roofing
you cannot be roofing
he cannot be roofing
we cannot be roofing
you cannot be roofing
they cannot be roofing

Perfect

I cannot have roofed
you cannot have roofed
he cannot have roofed
we cannot have roofed
you cannot have roofed
they cannot have roofed

V-ing perfect

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

Interrogative form

Simple form

can I roof?
can you roof?
can he roof?
can we roof?
can you roof?
can they roof?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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