I can tell you're upset.

I used a watering can to water my plants.

Regular exercise can enhance physical strength and endurance.

That can be said of mankind at large.

Please throw the trash in the garbage can.

I recycled the empty tin can.

How can I solve this problem?

He approached the job search with a catch-as-catch-can attitude, applying to any opportunity that came his way.

As you can see, the sky is clear and the sun is shining.

As we can see, the project is progressing smoothly.