| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | and [pron] is difficult [verb] | 85 |
|
| 2 | and [pron] is not [verb] | 82 |
|
| 3 | [pron] is difficult not [verb] | 28 |
|
| 4 | and [pron] is difficult not | 5 |
|
