| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] is difficult [verb] [noun] | 118 |
|
| 2 | [pron] is difficult [verb] such | 14 |
|
| 3 | [pron] is [verb] such [noun] | 12 |
|
| 4 | is difficult [verb] such [noun] | 8 |
|
