Nível Fluente › Wind Power

  • At the end of this lesson you'll be able to:

    • Understand the difference between the past simple and the present perfect
    • Use phrasal verbs with the word "run"
    • Understand different types of sustainable energy


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Dialog: "The United States overtook Germany as the biggest producer of wind power last year, and will likely take the lead in solar power this year, analysts have said."

The present perfect is used to talk about an action that happened at an unspecified time in the past. It's considered a present tense because there is always a connection to the present. There is no focus on when something happened, but rather the result of that action, which is in the present.


  • Sarah's gone to the supermarket. (she's there now)
  • Let's rent another movie, the kids have seen that one already. (result of action: must rent another movie)
  • Christine has asked Dan to come with us, but he doesn't want to go.  (no mention of when she asked)


With the present perfect you can talk about quantity of time:

  • The Gebhardts have lived in that house for 20 years.
  • Jennifer has been in the bathroom for almost an hour!
  • It's been 3 months since I last went to the cinema.


You can also talk about how many times you've done something:

  • I love that movie! I've seen it six times!
  • Morgan's been to Canada only once.
  • The team has won the state basketball championship twice.


The past simple is used to talk about an action that happened at a specific time in the past.

  • Sarah went to the supermarket an hour ago.
  • Let's rent another movie, the kids saw that one last week.
  • Christine asked Dan to come with us yesterday, but he didn't want to go.


*NOTE: The difference between the present perfect and the past simple can be confusing. A simple way to understand how they are different is to remember that you never mention when something happened with the present perfect.


Sobre esta aula

Americans get blamed for, well, almost everything that happens globally...and often the blame is well deserved. But as the U.S. government can cast a dark shadow over the planet they can just as easily cast a ray of hope. In today’s lesson Josh and Ashley talk about how the U.S. is leading the way in sustainable energy.

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