I already know how to turn on the television. I know how to drive a car. You would use the present perfect to express something that happened previously, without specifying the time.

Context Explanation

You'll only use the present perfect and "already" when expressing previous events relative to the present. I have been to France before. AOL: Radishes Grow Faster Than You Think—Here’s When to Harvest Them for the Best Texture and Flavor Radish seed is one of the first to plant out with edible roots ready for the table in as little as 30 days. Here's how fast they grow and how to tell it's time to harvest ...

Insight Material

Radishes Grow Faster Than You Think—Here’s When to Harvest Them for the Best Texture and Flavor