| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [adv] [verb] | 10519 |
|
| 2 | it be difficult [verb] | 2198 |
|
| 3 | be [adv] difficult [verb] | 1848 |
|
| 4 | it be [adv] difficult | 1332 |
|
| 5 | it [adv] difficult [verb] | 370 |
|
