Module 6 Save our world

unit 3  language in use
i. complete the sentences with the correct form of the words.
1. when are you going to write about ____________(environment) education?
2. if we don’t, the future is ___________. (hope)
3. it’s ____________(waste) to throw away paper and metal.
4. __________(use) means “use again”.
5. every class collects ___________(use) waste.
ii. grammar:
前綴（prefix）：一般不改變詞根的詞性
1. re- 表示 “再(again)” write—rewrite;
2. 表示否定的前綴：in- ,im- ,un- ,dis- 等。注：im- 用于b,m,p前。
   correct—incorrect; possible—impossible; healthy—unhealthy; agree—disagree; like—dislike
常見的后綴有：-er, -ful, -able, -less, -ly, -al, -ness…
   1. 構成名詞的后綴有：動詞—名詞：后加 -er/-or; -ion
                      read—reader;  visit—visitor  invent—invention; 
                      形容詞—名詞：后加 -ness；-ty;
                      serious—seriousness;  electric—electricity
常見的后綴有：-er, -ful, -able, -less, -ly, -al, -ness…
  2. 構成形容詞的后綴有：名詞—形容詞：后加-al;  -ful; -less; -ern;  -ive; -y….
    environment—environmental;  care—careful ; care—careless, south—southern;      collect—collective;  cloud--cloudy
常見的后綴有：-er, -ful, -able, -less, -ly, -al, -ness… 
-able: 表示可以，能夠的(can be)  enjoy—enjoyable
3. 構成副詞的后綴：-ly: 在形容詞后加-ly構成副詞。careful—carefully
iii. practice
 
1. can be collected_____
2. not done____________
3. full of hope__________
4. without any hope______
5. not possible___________
6. not usual______________
7. not used______________
8. used again_____________
9. not wanted_____________
10. making a lot of waste_____
iv. complete the table.
collectable
undone
hopeful
  hopeless
impossible
unusual
unused
reused
unwanted
wasteful
 
noun verb adjective adverb
 electricity --- electric ---
 energy ---  energetic energetically
environment ---  environmental  environmentally
 hope  hope  hopless hopelessly
 nation --- national  nationally
 pollution pollute  polluting ---