| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | so [adj] that | 4881 |
|
| 2 | so difficult [conj] | 28 |
|
| 3 | [adv] difficult that | 18 |
|
| 4 | [adv] difficult that | 17 |
|
| 5 | so difficult that | 13 |
|
