| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [adj] for they [to-vb] | 108 |
|
| 2 | it be difficult for [pron] [to-vb] | 73 |
|
| 3 | it [be] difficult for they [to-vb] | 15 |
|
| 4 | [pron] be difficult for they [to-vb] | 15 |
|
| 5 | it be difficult [prep] they [to-vb] | 15 |
|
| 6 | it be difficult for they [verb] | 15 |
|
| 7 | [pers pn] be difficult for they [to-vb] | 15 |
|
| 8 | it be difficult for they [to-vb] | 15 |
|
