| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be difficult for him [to-vb] | 5 |
|
| 2 | [modal v] be difficult for him [to-vb] | 5 |
|
| 3 | [vb mod] be difficult for him [to-vb] | 5 |
|
