| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it 's [adv] difficult [verb] | 199 |
|
| 2 | [no cls] it 's [adv] [verb] | 43 |
|
| 3 | [no cls] it 's [adv] difficult | 17 |
|
| 4 | [no cls] it 's difficult [verb] | 8 |
|
