| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] [pron] [be] [adv] difficult [conj] | 5 |
|
| 2 | [coord] [pron] [be] difficult [verb] [conj] | 28 |
|
| 3 | [coord] [pron] [be] difficult [to-vb] [conj] | 28 |
|
| 4 | [coord] [pron] [be] difficult believe [conj] | 9 |
|
| 5 | [coord] [pron] [be] difficult to believe [conj] | 9 |
|
