possible

1.possible的结构跟impossible相同。参见impossible

2.all the ways possible和the only way possible比all the possible ways和the only possible way普通。但all possible ways（没有the）和every possible way比all ways possible和every way possible普通。the best possible way也比the best way possible普通。the least possible delay也比the least delay possible普通。

3.It is possible that they will come today和It is possible that they may come today都可以说。

4.下面两句意思相同：

• I will try as hard as possible.
• I will try as hard as I can.

注意不可说I will try hard as possible as I can。

5.下面三句意思相同：

• I will do my possible.
• I will do my best.
• I will do my best possible.

有人以为第一句不好，第二句最妥当，第三句的语法结构可能有两种说法：（1）best修饰possible，（2）possible修饰best。