| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] not difficult [to-vb] | 155 |
|
| 2 | it [is] difficult [to-vb] that | 102 |
|
| 3 | [is] not difficult [to-vb] that | 16 |
|
| 4 | it [is] not [to-vb] that | 5 |
|
