English verb conjugation
CAN ROACH

Regular verb: roach - roached - roached

Affirmation

Simple form	V-ing form
I can roach you can roach she can roach we can roach you can roach they can roach	I can be roaching you can be roaching she can be roaching we can be roaching you can be roaching they can be roaching
Perfect	V-ing perfect
I can have roached you can have roached she can have roached we can have roached you can have roached they can have roached	I can have been roaching you can have been roaching she can have been roaching we can have been roaching you can have been roaching they can have been roaching

Negation

Simple form	V-ing form
I can't roach you can't roach she can't roach we can't roach you can't roach they can't roach	I can't be roaching you can't be roaching she can't be roaching we can't be roaching you can't be roaching they can't be roaching
Perfect	V-ing perfect
I can't have roached you can't have roached she can't have roached we can't have roached you can't have roached they can't have roached	I can't have been roaching you can't have been roaching she can't have been roaching we can't have been roaching you can't have been roaching they can't have been roaching

Interrogative form

Simple form	V-ing form
can I roach? can you roach? can she roach? can we roach? can you roach? can they roach?	can I be roaching? can you be roaching? can she be roaching? can we be roaching? can you be roaching? can they be roaching?
Perfect	V-ing perfect
can I have roached? can you have roached? can she have roached? can we have roached? can you have roached? can they have roached?	can I have been roaching? can you have been roaching? can she have been roaching? can we have been roaching? can you have been roaching? can they have been roaching?

Interro-negative form

Simple form	V-ing form
can't I roach? can't you roach? can't she roach? can't we roach? can't you roach? can't they roach?	can't I be roaching? can't you be roaching? can't she be roaching? can't we be roaching? can't you be roaching? can't they be roaching?
Perfect	V-ing perfect
can't I have roached? can't you have roached? can't she have roached? can't we have roached? can't you have roached? can't they have roached?	can't I have been roaching? can't you have been roaching? can't she have been roaching? can't we have been roaching? can't you have been roaching? can't they have been roaching?