| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it 's [adv] [conj] | 1357 |
|
| 2 | it 's [adv] difficult | 410 |
|
| 3 | it [adv] difficult [conj] | 40 |
|
| 4 | it 's difficult [conj] | 19 |
|
| 5 | 's [adv] difficult [conj] | 16 |
|
