Formal:
* The committee deemed the proposal worthy of further consideration.
* The court deemed the evidence admissible.
* The doctor deemed the patient's condition stable.
Informal:
* I deem it necessary to finish this project by Friday.
* They deemed the party a success.
* I deem it unwise to go out in this weather.
With different meanings:
* The judge deemed the witness unreliable. (meaning "considered" or "judged")
* She deemed herself worthy of the promotion. (meaning "believed" or "thought")
* The house was deemed uninhabitable after the fire. (meaning "declared" or "considered")
Note: "Deem" is a more formal word than "consider" or "think." It's often used in legal or official contexts.