| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | and [pers pn] is difficult [verb] | 85 |
|
| 2 | [pers pn] is often difficult [verb] | 59 |
|
| 3 | and [pers pn] is often [verb] | 19 |
|
| 4 | and [pers pn] is often difficult | 6 |
|
