| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [adv] difficult [prep] | 490 |
|
| 2 | be [adv] [prep] they | 163 |
|
| 3 | [adv] difficult [prep] they | 45 |
|
| 4 | be difficult [prep] they | 31 |
|
