| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [is] not difficult [verb] | 155 |
|
| 2 | [pron] [is] not [verb] that | 126 |
|
| 3 | [pron] [is] difficult [verb] that | 102 |
|
| 4 | [is] not difficult [verb] that | 16 |
|
