1. Lets do it, its worth a shot. I think global warming is worth mentioning at this conference. Its not worth arguing over a broken vase. This house is worth £2 million, we cant afford it. 2. This soil is rich in important minerals. Britain is rich in its historic places. Dairy products are rich in calcium. Saudi Arabia is rich in oil. 3. I am so tired of my boring job, I am going to look for a different job. She was tired of waiting for him to call so she called him first instead. I am sick and tired of hearing about politics. Dont you feel tired of people telling you what to do 4. Ive collected so many points at Starbucks that now I can get a free drink. She barely gets any free time, she is constantly working. Many high-end make-up stores give you free samples of cosmetics to try before you make a decision to buy it. The doctor is free now, he will call you in shortly.