| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] it be | 6542 |
|
| 2 | difficult [pron] be | 165 |
|
| 3 | difficult [pers pn] be | 162 |
|
| 4 | difficult it [be] | 158 |
|
| 5 | difficult it be | 158 |
|
