| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] 's difficult to [be] | 14 |
|
| 2 | [pron] 's difficult to [be] | 14 |
|
| 3 | it 's difficult to [be] | 14 |
|
| 4 | it 's difficult to [be] | 14 |
|
| 5 | 's difficult to [be] [adj] | 7 |
|
| 6 | 's difficult to [be] [adj] | 7 |
|
