| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] [adj] [verb] [that] | 444 |
|
| 2 | it is [adv] difficult [verb] [conj] | 43 |
|
| 3 | it is [adv] difficult [verb] [that] | 28 |
|
| 4 | it be [adv] difficult [verb] [that] | 17 |
|
| 5 | it [be] [adv] difficult [verb] [that] | 17 |
|
| 6 | it [is] [adv] difficult [verb] [that] | 14 |
|
| 7 | [pron] is [adv] difficult [verb] [that] | 13 |
|
