| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it 's [verb] [conj] | 320 |
|
| 2 | it 's difficult [verb] | 290 |
|
| 3 | it difficult [verb] [conj] | 79 |
|
| 4 | it 's difficult [conj] | 19 |
|
| 5 | 's difficult [verb] [conj] | 17 |
|
