| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | difficult it be [prep] [pers pn] | 10 |
|
| 2 | difficult it be for [pron] | 10 |
|
| 3 | difficult it be for [pron] | 10 |
|
| 4 | difficult it be [prep] [pron] | 10 |
|
| 5 | difficult it was [prep] [pron] | 6 |
|
