a is more important than b.
b is less important than a.
（以下两句表示b不如a重要）：
b is not as important as a.
b is not so important as a.
a is more than b.
b is less than a.
b is not as much as a.
b is not so much as a.
a is more important than b.
b is less important than a.
（以下两句表示b不如a重要）：
b is not as important as a.
b is not so important as a.
a is more than b.
b is less than a.
b is not as much as a.
b is not so much as a.