| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [was/were] [verb] | 130224 |
|
| 2 | [pron] difficult [verb] | 1153 |
|
| 3 | [pron] [was/were] difficult | 596 |
|
| 4 | [was/were] difficult [verb] | 531 |
|
