| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | 's problem be | 66 |
|
| 2 | 's problems be | 65 |
|
| 3 | 's problem is | 45 |
|
| 4 | 's problem were | 29 |
|
| 5 | 's problem was | 28 |
|
| 6 | 's problem are | 27 |
|
