| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] it be [prep] | 511 |
|
| 2 | difficult it be [prep] | 37 |
|
| 3 | difficult [pers pn] be [prep] | 37 |
|
| 4 | difficult [pron] be [prep] | 37 |
|
| 5 | difficult it [be] [prep] | 37 |
|
