Present Perfect
We (read) an interesting article about risk.
We have read an interesting article about risk.
He speaks French. He (negative) _____ Spanish.
He speaks French. He doesn't speak Spanish.
Alex is climbing a mountain now. He ____ that mountain ____ eight hours. He ____ that mountain five times.
Alex is climbing a mountain now. He has been climbing that mountain for eight hours. He 's climbed that mountain five times.
Washoe lived with the Gardners. She (negative) _____ in a zoo.
Washoe lived with the Gardners. She didn't in a zoo.
James Cameron (make) movies _____ 1984.
James Cameron has been making movies since 1984.
Jean-Guy Godin (do) experiments with guppies.
Jean-Guy Godin has done experiments with guppies.
He uses video chat. _____ other methods, too? Yes, he ____.
He uses video chat. Does he use other methods, too? Yes, he does.
Alex is preparing for his next climb. He _____ for several months.
Alex is preparing for his next climb. He 's been preparing for several months.
The Gardners took care of her at home. Who ____ care of her at the Primate Institute?
The Gardners took care of her at home. Who took care of her at the Primate Institute?
He (explore) the ocean ____ many years.
He has been exploring the ocean for many years.
They (make) many interesting discoveries.
They have made many interesting discoveries.
Timothy speaks a lot of languages. _____ Urdu? Yes, he _____.
Timothy speaks a lot of languages. Does he speak Urdu? Yes, he does.
I _____ the documentary "Free Solo," yet; ____ you?
I 've not seen the documentary "Free Solo," yet; have you?
She started to communicate with other chimps, but she (negative) _____ immediately.
She started to communicate with other chimps, but she didn't start immediately.
The Wallenda family (perform) risky activities ____ seven generations.
The Wallenda family has been performing risky activities for seven generations.
He (observe) guppies and how they take risks.
He has observed guppies and how they take risks.
New York ____ people from all over the world. ____ New York have people from Indonesia? Yes, it ____.
New York has people from all over the world. Does New York have people from Indonesia? Yes, it does.
No, _____. I want to see it, though!
No, I haven't. I want to see it, though!
She felt comfortable with humans. At first, she (negative) _____ comfortable with other chimps. Why (negative) ____ comfortable with other chimps?
She felt comfortable with humans. At first, she didn't feel comfortable with other chimps. Why didn't she feel comfortable with other chimps?
Sylvia Earle (study) the ocean ____ many years.
Sylvia Earle has been studying the ocean for many years.
They never (hear) of this research before.
They have never heard of this research before.
Some languages ____ accent marks. ____ Hebrew have accent marks?
Some languages have accent marks. Does Hebrew have accent marks?
I _____ a few risks ___ my life. For example, I ____ a risk when I left my country and went to live in another country.
I 've taken a few risks in my life. For example, I took a risk when I left my country and went to live in another country.
When ____? She died in 2007.
When did she die? She died in 2007.
People (climb) Mt. Everest ___ 1953.
People have been climbing Mt. Everest since 1953.