English verb conjugation
CAN PREOCCUPY

Regular verb: preoccupy - preoccupied - preoccupied

Affirmation

Simple form	V-ing form
I can preoccupy you can preoccupy she can preoccupy we can preoccupy you can preoccupy they can preoccupy	I can be preoccupying you can be preoccupying she can be preoccupying we can be preoccupying you can be preoccupying they can be preoccupying
Perfect	V-ing perfect
I can have preoccupied you can have preoccupied she can have preoccupied we can have preoccupied you can have preoccupied they can have preoccupied	I can have been preoccupying you can have been preoccupying she can have been preoccupying we can have been preoccupying you can have been preoccupying they can have been preoccupying

Negation

Simple form	V-ing form
I can't preoccupy you can't preoccupy she can't preoccupy we can't preoccupy you can't preoccupy they can't preoccupy	I can't be preoccupying you can't be preoccupying she can't be preoccupying we can't be preoccupying you can't be preoccupying they can't be preoccupying
Perfect	V-ing perfect
I can't have preoccupied you can't have preoccupied she can't have preoccupied we can't have preoccupied you can't have preoccupied they can't have preoccupied	I can't have been preoccupying you can't have been preoccupying she can't have been preoccupying we can't have been preoccupying you can't have been preoccupying they can't have been preoccupying

Interrogative form

Simple form	V-ing form
can I preoccupy? can you preoccupy? can she preoccupy? can we preoccupy? can you preoccupy? can they preoccupy?	can I be preoccupying? can you be preoccupying? can she be preoccupying? can we be preoccupying? can you be preoccupying? can they be preoccupying?
Perfect	V-ing perfect
can I have preoccupied? can you have preoccupied? can she have preoccupied? can we have preoccupied? can you have preoccupied? can they have preoccupied?	can I have been preoccupying? can you have been preoccupying? can she have been preoccupying? can we have been preoccupying? can you have been preoccupying? can they have been preoccupying?

Interro-negative form

Simple form	V-ing form
can't I preoccupy? can't you preoccupy? can't she preoccupy? can't we preoccupy? can't you preoccupy? can't they preoccupy?	can't I be preoccupying? can't you be preoccupying? can't she be preoccupying? can't we be preoccupying? can't you be preoccupying? can't they be preoccupying?
Perfect	V-ing perfect
can't I have preoccupied? can't you have preoccupied? can't she have preoccupied? can't we have preoccupied? can't you have preoccupied? can't they have preoccupied?	can't I have been preoccupying? can't you have been preoccupying? can't she have been preoccupying? can't we have been preoccupying? can't you have been preoccupying? can't they have been preoccupying?