1. It is…that… 强调句
It is + 要强调的部分+ that + 句子剩余部分
正常语序：The earth harmed by human activities is an undeniable fact.
强调句：It is an undeniable fact that human activities harm the Earth.
“only + 状语（从句）” 位于句首引起的倒装句；only修饰副词、介词短语或状语从句，放在句首。
正常语序：People realized they had made a big mistake only after the sand storm came.
倒装句：Only after the sand storm came did people realize they had made a big mistake.
3. 使用not…but… 句型
Treat the earth well, for it is not given to you by your parents but lent to you by your children.
4. There be 句型
There is a large percentage of water and land polluted around us.
5. so …that…句型
Human beings are so economy-oriented that they ignore the protection of the environment.