| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be difficult [prep] they [verb] | 27 |
|
| 2 | it difficult [prep] they [verb] | 20 |
|
| 3 | it be difficult [prep] they | 17 |
|
| 4 | it be [prep] they [verb] | 13 |
|
| 5 | it be difficult [prep] [verb] | 5 |
|
