| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh adv] it [is] | 2473 |
|
| 2 | [Wh adv] difficult it | 159 |
|
| 3 | difficult it [is] | 116 |
|
| 4 | [Wh adv] difficult [is] | 6 |
|
