| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [adv] [adv] difficult | 624 |
|
| 2 | [be] [adv] difficult to say | 33 |
|
| 3 | [be] [adv] [adv] to say | 33 |
|
| 4 | [be] [adv] difficult to say | 30 |
|
| 5 | [adv] [adv] difficult to say | 6 |
|
