| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] it [be] [verb] [conj] | 908 |
|
| 2 | [coord] it [be] difficult [verb] | 251 |
|
| 3 | it [be] difficult [verb] [conj] | 233 |
|
| 4 | [coord] it [be] difficult [conj] | 6 |
|
| 5 | [coord] [be] difficult [verb] [conj] | 6 |
|
