| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] difficult [to-vb] that | 73 |
|
| 2 | so [adj] [to-vb] that | 60 |
|
| 3 | [adv] difficult [to-vb] that | 50 |
|
| 4 | so difficult [to-vb] [conj] | 15 |
|
| 5 | so difficult [to-vb] that | 8 |
|
| 6 | so difficult [to-vb] that | 8 |
|
| 7 | so difficult [verb] that | 8 |
|
| 8 | so difficult [to-vb] [that] | 8 |
|
