In a contract how can a condition precedent become a condition subsequent?

A condition precedent is an event that must occur before a party is obligated to perform under a contract. It can become a condition subsequent if the contract is structured to allow for the termination of obligations once a specific event occurs after the initial performance has begun. For example, if a contract stipulates that a party must continue performing until a certain event occurs, that event can serve as a condition subsequent that ends the obligation to perform. This shift emphasizes the change in obligations based on subsequent events rather than initial prerequisites.