| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] it [be] for [noun] [to-vb] | 21 |
|
| 2 | difficult it [be] [prep] [noun] [to-vb] | 9 |
|
| 3 | difficult [pron] [be] for [noun] [to-vb] | 9 |
|
| 4 | difficult it [be] for [noun] [verb] | 9 |
|
