| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it [is] [adv] [verb] | 2453 |
|
| 2 | it [is] [adv] difficult [verb] | 919 |
|
| 3 | [conj] it [is] difficult [verb] | 430 |
|
| 4 | [conj] it [is] [adv] difficult | 298 |
|
| 5 | [conj] [is] [adv] difficult [verb] | 35 |
|
