| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [adj] for them [to-vb] | 108 |
|
| 2 | it be difficult for [pron] [to-vb] | 73 |
|
| 3 | it be difficult for [pers pn] [to-vb] | 68 |
|
| 4 | it [be] difficult for them [to-vb] | 15 |
|
| 5 | it be difficult for them [verb] | 15 |
|
| 6 | it be difficult [prep] them [to-vb] | 15 |
|
| 7 | it be difficult for they [to-vb] | 15 |
|
| 8 | [pron] be difficult for them [to-vb] | 15 |
|
| 9 | [pers pn] be difficult for them [to-vb] | 15 |
|
| 10 | it be difficult for them [to-vb] | 15 |
|
