| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it 's [adv] [verb] | 1861 |
|
| 2 | it 's [adv] difficult | 381 |
|
| 3 | it [adv] difficult [verb] | 370 |
|
| 4 | it 's difficult [verb] | 290 |
|
| 5 | 's [adv] difficult [verb] | 219 |
|
