内容正文:
Unit 1 The Changing World
Topic 3 The world has changed for the better.
· 词形转换
terrible
→ (副词)
wonder
→ (形容词)
beauty
→ (形容词)
excellent
→ (名词)
friendly
→ (反义词)
danger
→ (形容词)
art
→ (名词)
help
→ (形容词)
express
→ (名词)
normal
→ (副词)
decide
→ (名词)
suit
→ (形容词)
treat
→ (名词)
immediate
→ (副词)
base
→ (形容词)
value
→ (形容词)
effect
→ (动词)
hope
→ (形容词)
educate
→ (名词)
health
→ (形容词)
important
→ (名词)
labor
→ (名词)
safe
→ (名词)
home
→ (形容词)
→ (副词)
→ (名词)
die
→ (名词)
steal
→ (过去式)
→ (形容词)
→ (过去分词)
· 语法 ——现在完成时(III)
1. He has been away from the army for nine years because of a leg wound.
(1) for和since区别
for用来说明动作的延续时间长短,即多