| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [be] [adv] difficult for | 180 |
|
| 2 | that [pron] [be] [adv] difficult | 111 |
|
| 3 | that [pron] [be] [adv] for | 67 |
|
| 4 | that [pron] [be] difficult for | 25 |
|
