| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [adv] difficult [pers pn] is for | 13 |
|
| 2 | know [adv] [adj] [pers pn] is for | 9 |
|
| 3 | know [adv] difficult [pers pn] is [prep] | 6 |
|
| 4 | know [adv] difficult [pers pn] be for | 5 |
|
| 5 | know [adv] difficult [pers pn] [is] for | 5 |
|
| 6 | know [adv] difficult [pers pn] [be] for | 5 |
|
| 7 | know [adv] difficult [pron] is for | 5 |
|
