| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] difficult for us [to-vb] | 24 |
|
| 2 | [be] difficult for we [to-vb] | 24 |
|
| 3 | be difficult for we [to-vb] | 24 |
|
| 4 | [is] difficult for we [to-vb] | 17 |
|
| 5 | is difficult for we [to-vb] | 13 |
|
| 6 | be difficult for we [to-vb] | 6 |
|
| 7 | [be] difficult for we [to-vb] | 6 |
|
