1. It's 10:00 a.m. He in the office now. (Correct)(Incorrect)
It's 10:00 a.m. He must be in the office now. (Correct)
2. They live in a very big house. They rich. (Correct)(Incorrect)
They live in a very big house. They must be rich. (Correct)
3. Try calling him in the evening. He home by eight. (Correct)(Incorrect)
Try calling him in the evening. He should be home by eight. (Correct)
4. You our report tomorrow. (Correct)(Incorrect)
You should receive our report tomorrow. (Correct)
5. Let's watch the film about meteorites on Channel 6. It interesting. (Correct)(Incorrect)
Let's watch the film about meteorites on Channel 6. It should be interesting. (Correct)
6. I can't find my car keys. I them in my office. (Correct)(Incorrect)
I can't find my car keys. I must have left them in my office. (Correct)
7. There is no one by the name Lisa here. You misdialed. (Correct)(Incorrect)
There is no one by the name Lisa here. You must have misdialed. (Correct)
8. I'm worried. He me two hours ago. Where can he be? (Correct)(Incorrect)
I'm worried. He should have called me two hours ago. Where can he be? (Correct)
9. He go to France next month. (Correct)(Incorrect)
He will probably go to France next month. (Correct)
10. I need to see him as soon as possible. come back soon? (Correct)(Incorrect)
I need to see him as soon as possible. Is he likely to come back soon? (Correct)