| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] be difficult for [art] | 27 |
|
| 2 | [vb mod] be difficult for [art] | 27 |
|
| 3 | [vb mod] be difficult for the | 17 |
|
| 4 | may be difficult for [art] | 9 |
|
| 5 | [vb mod] be difficult for a | 8 |
|
| 6 | will be difficult for [art] | 7 |
|
