| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh adv] [adj] is | 1341 |
|
| 2 | [adv] difficult is | 23 |
|
| 3 | [Wh adv] difficult [be] | 8 |
|
| 4 | [Wh adv] difficult be | 8 |
|
| 5 | [Wh adv] difficult [is] | 6 |
|
