| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh adv] [adj] it is | 685 |
|
| 2 | [Wh adv] difficult it be | 117 |
|
| 3 | [Wh adv] difficult it [be] | 117 |
|
| 4 | [adv] difficult it is | 104 |
|
| 5 | [Wh adv] difficult [pron] is | 82 |
|
| 6 | [Wh adv] difficult [pers pn] is | 81 |
|
| 7 | [Wh adv] difficult it [is] | 80 |
|
| 8 | [Wh adv] difficult it is | 79 |
|
