| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] difficult for they [to-vb] | 15 |
|
| 2 | it [be] difficult for them [to-vb] | 15 |
|
| 3 | it be difficult for they [to-vb] | 15 |
|
| 4 | it [is] difficult for they [to-vb] | 12 |
|
| 5 | it is difficult for they [to-vb] | 12 |
|
