摘要：
1）Ithasmoredisadvantagesthanadvantages．2）Itdoesusmuchharm．3）Itisharmfultous．例如:However,eve... 1）It
has more disadvantages than advantages．
2）It does us much harm．
3）It is harmful to us．
例如: However,everything divides into two．Television can also be harmful to
us．It can do harm to our health and make us lazy if we spend too much time
watching television．
⊥14
13⊥．表示重要、必要、困难、方便、可能
1）It is important（necessary,difficult,convenient, possible）for sb．to do
sth．
2）We think it necessary to do sth．
3）It plays an important role in our life．
4) It is of great significance to …
例如: Computers are now being used everywhere,whether in the government,in
schools or in business．Soon, computers will be found in every home,too．We
