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 cannot preobtain you cannot preobtain he cannot preobtain we cannot preobtain you cannot preobtain they cannot preobtain	I cannot be preobtaining you cannot be preobtaining he cannot be preobtaining we cannot be preobtaining you cannot be preobtaining they cannot be preobtaining
Perfect	V-ing perfect
I cannot have preobtained you cannot have preobtained he cannot have preobtained we cannot have preobtained you cannot have preobtained they cannot have preobtained	I cannot have been preobtaining you cannot have been preobtaining he cannot have been preobtaining we cannot have been preobtaining you cannot have been preobtaining they cannot 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 I not preobtain? can you not preobtain? can he not preobtain? can we not preobtain? can you not preobtain? can they not preobtain?	can I not be preobtaining? can you not be preobtaining? can he not be preobtaining? can we not be preobtaining? can you not be preobtaining? can they not be preobtaining?
Perfect	V-ing perfect
can I not have preobtained? can you not have preobtained? can he not have preobtained? can we not have preobtained? can you not have preobtained? can they not have preobtained?	can I not have been preobtaining? can you not have been preobtaining? can he not have been preobtaining? can we not have been preobtaining? can you not have been preobtaining? can they not have been preobtaining?