| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be difficult [to-vb] [Wh adv] | 276 |
|
| 2 | difficult [to-vb] just [Wh adv] | 12 |
|
| 3 | be difficult [to-vb] just | 12 |
|
| 4 | be [to-vb] just [Wh adv] | 10 |
|
