| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | since it be [adv] difficult | 6 |
|
| 2 | since it be [adv] difficult | 6 |
|
| 3 | since it be difficult [to-vb] | 16 |
|
| 4 | since it be difficult [verb] | 16 |
|
