| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] it 's [adv] difficult [verb] | 9 |
|
| 2 | [noun sg] [pers pn] 's [adv] difficult [to-vb] | 9 |
|
| 3 | [noun sg] [pers pn] 's very difficult [verb] | 6 |
|
