| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] difficult [verb] [conj] | 179 |
|
| 2 | it [is] sometimes [verb] [conj] | 101 |
|
| 3 | it [is] sometimes difficult [verb] | 24 |
|
| 4 | [is] sometimes difficult [verb] [conj] | 5 |
|
