1. Chapter 10

2.  Why is the teacher sad?  She is hungry ! 100%  She must be hungry ! 95%  She may be hungry > 50% or less  She might be hungry  She could be hungry

3.  That man is not the murderer. 100%  That man could not be the murderer.  That man cannot be the murderer. >99%  That man must not be the murderer. 95%  That man may not be the murderer.  That man might not be the murderer. 50 % or less

4. She is hungry ! She must be hungry ! She may be hungry She could be hungry She might be hungry That man is not the murderer. That man could not be the murderer. That man cannot be the murderer. That man must not be the murderer. That man may not be the murderer. That man might not be the murderer.

5.  Why was not Mary in class? She was sick ! 100% She must have been sick ! 95 % She may have been sick She might have been sick 50% or less She could have been sick

6.  Why didn’t Sam eat ?  He was not hungry. 100%  He couldn’t have been hungry.  He cant have been hungry. 99%  He mustn’t have been hungry. 95%  He may not have been hungry  He might not have been hungry. 50%

7. She was sick ! She must have been sick ! She may have been sick She might have been sick She could have been sick He was not hungry. He couldn’t have been hungry He cant have been hungry He mustn’t have been hungry He may not have been hungry He might not have been hungry

8. I will pass to Level D ! 100% sure I should/ought to pass to level D. 90% sure I may pass to level D. I might pass to Level D. 50% sure (guessing) I could pass to Level D.

9.  Don’t ring the bell. The baby may be sleeping. ( 50% baby is sleeping )  The kitchen smells good ! My mum must be cooking ! ( 95% she is cooking )  (the speaker is guessing and he is talking about present.)

10.  Ability:  I cannot lift the table, I am not strong, but he can lift it. He is strong.  Acquired skill:  I cannot play any musical instruments, I do not have the ability   Possibility:  You can buy lots of things on internet.  Giving permission:  When you finish the test, you can leave. (You can also use “may” for this sentence.)

11.  There are two different ways to talk about past habits. You can use "used to" or "would" to describe actions that you did repeatedly in the past. I used to walk to school. I would walk to school.  We can use "used to," but not "would," to talk about past situations (not repeated actions).  I used to live in Paris (Living somewhere is a long-term situation not an action that you do repeatedly.)

12.  I would rather go to Sanko Park than do homework  I would rather study English than (study) French.  Would rather expresses preference.

13.  How old are you?  I would rather not tell you.  Did you like the movie “Inception”?  I would rather have gone to another film.  What do you want now?  I would rather be lying on the beach right now than (be) sitting in the class.