The following four sentences present four different usages of the word 不过. Please discuss the distinctions and connections among the four usages, illustrating your points with your own examples where necessary.
1)不过二年，君必无患。
2)他十七岁就结婚，一年后当了爸爸，不过十八岁。
3)这是个乖巧不过的孩子。
4)我也没有长策，不过这种事情，其事已迫，不能计出万全的。

不过不过不过不过

The following four sentences present four different usages of the word 不过. Please discuss the distinctions and connections among the four usages, illustrating your points with your own examples where necessary.
1)不过二年，君必无患。
2)他十七岁就结婚，一年后当了爸爸，不过十八岁。
3)这是个乖巧不过的孩子。
4)我也没有长策，不过这种事情，其事已迫，不能计出万全的。