| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] is difficult [verb] | 1533 |
|
| 2 | [pers pn] is often [verb] | 394 |
|
| 3 | is often difficult [verb] | 80 |
|
| 4 | [pers pn] is often difficult | 70 |
|
