| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] is difficult [to-vb] [det] [noun pl] | 18 |
|
| 2 | it is difficult [verb] [det] [noun pl] | 18 |
|
| 3 | [pers pn] is difficult [verb] these [noun pl] | 8 |
|
