| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] is [verb] | 41863 |
|
| 2 | [pron] is difficult | 1968 |
|
| 3 | is difficult [verb] | 1946 |
|
| 4 | [pron] difficult [verb] | 1153 |
|
