| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] is not difficult [verb] | 140 |
|
| 2 | [pron] is not [verb] that | 114 |
|
| 3 | [pron] is difficult [verb] that | 97 |
|
| 4 | is not difficult [verb] that | 15 |
|
