To do
Read this story. Pay attention to all the modals in it. Then you'll answer some questions to see how much you understand. After this we'll look at meaning and form in more detail.
Story
Mo loves space. He thinks there might be life forms on Mars. He says NASA found methane gas on the planet that may suggest this. He says scientists aren’t sure but it’s possible that it could be coming from very small bacteria-like organisms.
When he told his sister Jo, she said: "Oh, it can’t be true! Mars is a dead planet, isn’t it? There must be another explanation."
Mo replied: "Well their information might not be completely accurate. But a few years ago they found the remains of an ancient lake on Mars. NASA says it may have been suitable for life in the past. So who knows what’s there now?