| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] it be [to-vb] [pos pn] | 18 |
|
| 2 | difficult it be [to-vb] [pron] | 14 |
|
| 3 | difficult it be [verb] [pos pn] | 5 |
|
| 4 | difficult [pron] be [to-vb] [pos pn] | 5 |
|
| 5 | difficult it [be] [to-vb] [pos pn] | 5 |
|
