| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | the problem which [vb mod] [vb infin] | 13 |
|
| 2 | the problem which [modal v] [vb infin] | 13 |
|
| 3 | the problem which [modal v] [vb infin] | 13 |
|
| 4 | the problems which [modal v] [vb infin] | 11 |
|
| 5 | the problem which [modal v] arise | 7 |
|
| 6 | the problem which can [vb infin] | 5 |
|
| 7 | the problem which can [vb infin] | 5 |
|
