General uses:
* The new software significantly increased the efficiency of our workflow.
* Efficiency is key to achieving our goals within budget.
* The company prides itself on its operational efficiency.
Specific examples:
* By using public transportation, I improved the efficiency of my commute.
* The efficiency of the solar panels was impressive, generating enough power for the entire house.
* Efficiency in communication is essential for clear understanding.
Figurative uses:
* The author's efficiency in using words was evident in the concise and powerful prose.
* Despite its age, the car still runs with impressive efficiency.
Remember to choose the appropriate tense and context for your sentence.