| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh adv] difficult it be | 117 |
|
| 2 | [Wh adv] difficult it [be] | 117 |
|
| 3 | [Wh adv] difficult it [be] | 117 |
|
| 4 | how difficult it [be] | 115 |
|
| 5 | [Wh adv] difficult it [is] | 80 |
|
| 6 | [Wh adv] difficult it is | 79 |
|
| 7 | [Wh adv] difficult it was | 37 |
|
| 8 | [Wh adv] difficult it [was/were] | 37 |
|
