English verb conjugation
CAN PREOBTAIN

Regular verb: preobtain - preobtained - preobtained

Affirmation

Simple form	V-ing form
I can preobtain you can preobtain he can preobtain we can preobtain you can preobtain they can preobtain	I can be preobtaining you can be preobtaining he can be preobtaining we can be preobtaining you can be preobtaining they can be preobtaining
Perfect	V-ing perfect
I can have preobtained you can have preobtained he can have preobtained we can have preobtained you can have preobtained they can have preobtained	I can have been preobtaining you can have been preobtaining he can have been preobtaining we can have been preobtaining you can have been preobtaining they can have been preobtaining

Negation

Simple form	V-ing form
I can't preobtain you can't preobtain he can't preobtain we can't preobtain you can't preobtain they can't preobtain	I can't be preobtaining you can't be preobtaining he can't be preobtaining we can't be preobtaining you can't be preobtaining they can't be preobtaining
Perfect	V-ing perfect
I can't have preobtained you can't have preobtained he can't have preobtained we can't have preobtained you can't have preobtained they can't have preobtained	I can't have been preobtaining you can't have been preobtaining he can't have been preobtaining we can't have been preobtaining you can't have been preobtaining they can't have been preobtaining

Interrogative form

Simple form	V-ing form
can I preobtain? can you preobtain? can he preobtain? can we preobtain? can you preobtain? can they preobtain?	can I be preobtaining? can you be preobtaining? can he be preobtaining? can we be preobtaining? can you be preobtaining? can they be preobtaining?
Perfect	V-ing perfect
can I have preobtained? can you have preobtained? can he have preobtained? can we have preobtained? can you have preobtained? can they have preobtained?	can I have been preobtaining? can you have been preobtaining? can he have been preobtaining? can we have been preobtaining? can you have been preobtaining? can they have been preobtaining?

Interro-negative form

Simple form	V-ing form
can't I preobtain? can't you preobtain? can't he preobtain? can't we preobtain? can't you preobtain? can't they preobtain?	can't I be preobtaining? can't you be preobtaining? can't he be preobtaining? can't we be preobtaining? can't you be preobtaining? can't they be preobtaining?
Perfect	V-ing perfect
can't I have preobtained? can't you have preobtained? can't he have preobtained? can't we have preobtained? can't you have preobtained? can't they have preobtained?	can't I have been preobtaining? can't you have been preobtaining? can't he have been preobtaining? can't we have been preobtaining? can't you have been preobtaining? can't they have been preobtaining?