| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is difficult [verb] [conj] | 164 |
|
| 2 | it is [verb] [conj] they | 117 |
|
| 3 | it is difficult [verb] they | 25 |
|
| 4 | it difficult [verb] [conj] they | 7 |
|
| 5 | is difficult [verb] [conj] they | 6 |
|
