| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | was [adj] [verb] [adj] | 1529 |
|
| 2 | be difficult [verb] [adj] | 329 |
|
| 3 | [be] difficult [verb] [adj] | 329 |
|
| 4 | [was/were] difficult [verb] [adj] | 42 |
|
