| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] it [adv] difficult [verb] that | 5 |
|
| 2 | it be [adv] difficult [verb] that | 39 |
|
| 3 | it [be] [adv] difficult [verb] that | 39 |
|
| 4 | it [is] [adv] difficult [verb] that | 30 |
|
| 5 | it is [adv] difficult [verb] that | 28 |
|
| 6 | it was [adv] difficult [verb] that | 9 |
|
| 7 | it [was/were] [adv] difficult [verb] that | 9 |
|
