| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | the problems that [verb] | 95 |
|
| 2 | problems that [vb mod] [verb] | 76 |
|
| 3 | the problems that [vb mod] | 33 |
|
| 4 | the problems [vb mod] [verb] | 9 |
|
