| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [prep] [pers pn] [verb] | 137 |
|
| 2 | be difficult [prep] [pers pn] [verb] | 107 |
|
| 3 | it be difficult [prep] [pers pn] | 88 |
|
| 4 | it difficult [prep] [pers pn] [verb] | 64 |
|
| 5 | it be difficult [prep] [verb] | 5 |
|
