Living with disease（The Fourth Period）

 suggested answers：
1.immune，defenseless，infection，cure，contract，virus，suffer
  2.discourage，specialist, 1onely，eventually，break down，die of，cheer up，deal with, as if, a lack of
t：well, now 1ook at these words on the screen.what other words do they make you think of?
aids，immune，defenseless infected, cure, contract, virus, suffer
ss：transmit，prevention, illness, treatment，defensive, diagnose, contagious，sick，hospital，(in)curable, spread，recover…
t：yes.you’ve collected so many words which can be used to talk about disease.next, please look at the two sentences on the blackboard and rewrite them using “i wish…” and “if…”.
  (bb：1.i don’t know where he lives.
  2.people are afraid of sars because they don't know much about it.)
  t：who’d like to have a try? please come to the blackboard and write down your    sentences.one student，one sentence.
   suggested answers：
    1.i wish i knew where he lives.
    2.if people knew much about sars，they would not be afraid of it.
step ⅶ summary and homework
   t：well.how busy this period is! we’ve not only practised listening and reading，but also practised speaking and writing.we’ve also learnt many useful words and expressions.after class, please review what we’ve learnt in this class and preview what we’ll learn in the next unit.
step vⅲ the design of the writing on the blackboard
unit 7  living with disease the fourth period
   i.useful expressions：
      to the full，a great many，on the contrary，free…from，take a chance，for the moment，think of…as
   ⅱ.words concerned with diseases
       aids immune defenseless infected cure contract virus suffer treatment…
   iii. the subjunctive mood  
        1.i don’t know where he lives.
         →i wish i knew where he lives.  ；
        2.people are afraid of sars because they don’t know much about it.
         →if people knew much about sars，they would not be afraid of it.
step ix record after teaching