| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] very difficult [verb] [coord] | 14 |
|
| 2 | be very difficult [verb] [coord] | 14 |
|
| 3 | [be] very difficult [to-vb] [coord] | 14 |
|
| 4 | [be] very difficult [verb] and | 12 |
|
| 5 | [is] very difficult [verb] [coord] | 5 |
|
