They have never saw the Grand Canyon before their trip to the United States., They have never seen the Grand Canyon before their trip to the United States., She have explored the ancient ruins in Athens many times., She has explored the ancient ruins in Athens many times., We have not visited the famous museum in Madrid yet., We not visited the famous museum in Madrid yet., By the time we arrive in Rome, they have already been to the Colosseum., By the time we arrive in Rome, they already have been to the Colosseum., He has took a guided tour of the botanical gardens., He has taken a guided tour of the botanical gardens., They just have returned from their trip to Machu Picchu., They have just returned from their trip to Machu Picchu., I have never experienced such a breathtaking view as the one from the tower., I never have experienced such a breathtaking view as the one from the tower.

Controlled practice Present Perfect

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