| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | was [verb] that [adj] | 911 |
|
| 2 | difficult [verb] that [adj] | 48 |
|
| 3 | was difficult [verb] [adj] | 40 |
|
| 4 | was difficult [verb] that | 31 |
|
