| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] [adv] [adj] [verb] that | 627 |
|
| 2 | it [is] [adv] difficult [verb] [conj] | 72 |
|
| 3 | it [be] [adv] difficult [verb] that | 39 |
|
| 4 | [pron] [is] [adv] difficult [verb] that | 30 |
|
| 5 | it [is] [adv] difficult [verb] [that] | 30 |
|
| 6 | it [is] [adv] difficult [verb] that | 30 |
|
