| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [Wh adv] difficult it [be] for | 20 |
|
| 2 | [vb base] [Wh adv] difficult it [be] for | 7 |
|
| 3 | know [Wh adv] difficult it [be] for | 5 |
|
| 4 | know [Wh adv] difficult it [be] for | 5 |
|
| 5 | [vb past] [Wh adv] difficult it [be] for | 5 |
|
| 6 | [Wh adv] difficult it [modal v] [be] for | 5 |
|
| 7 | [Wh adv] difficult it [vb mod] [be] for | 5 |
|
| 8 | [Wh adv] difficult it [be] for [noun] | 10 |
|
| 9 | [Wh adv] difficult it [be] for [pers pn] | 7 |
|
| 10 | [Wh adv] difficult it [be] for [noun pl] | 7 |
|
| 11 | [Wh adv] difficult it [be] for [pron] | 7 |
|
