| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [verb] that [noun] | 782 |
|
| 2 | [is] difficult [verb] [noun] | 142 |
|
| 3 | [is] difficult [verb] that | 102 |
|
| 4 | difficult [verb] that [noun] | 40 |
|
