interesting. has gone

　　have been Activity 4 3. Some American astronauts _______

　　to the moon several times. 4. A British astronaut ________ to the

　　space station. He’ll come back in January. have been has gone Complete the passage with the

　　correct form of the verbs. Nicky: I’ve just (1) ____ (see ) a great TV

　　programme about space. Did you know

　　that scientists have ( 2) __________

　　(discover) water on Mars? Bill:

　　No! Really? That’s very interesting.

　　(3)____ they ____(try) to find life on Mars? seen discovered Have tried Activity 5 Nicky: Well, they’re looking for life but they

　　(4) ___________ (not find) anything

　　yet. Bill:

　　They’ve already (5) ______ (find) that

　　there’s no life on the moon. Nicky: Yes, that’s right. So far there’s only

　　life on Earth.

　　haven’t found found A: Have you done … yet? B: Yes, I have.

　　I have already / just

　　done … / No, I haven’t.

　　I haven’t

　　done … yet. A: Have you done … yet? B: Yes, I have.

　　I have already/just

　　done … / No, I haven’t. I haven’t done … yet.

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