| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh adv] [adj] [pers pn] [is] [prep] | 169 |
|
| 2 | [Wh adv] difficult [pers pn] [be] [prep] | 31 |
|
| 3 | [adv] difficult [pers pn] [is] [prep] | 24 |
|
| 4 | [Wh adv] difficult [pron] [is] [prep] | 21 |
|
