| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be very difficult for [pron] [verb] | 25 |
|
| 2 | be very difficult for [pers pn] [verb] | 24 |
|
| 3 | be very [adj] for us [verb] | 17 |
|
| 4 | be [adv] difficult for us [verb] | 10 |
|
| 5 | be very difficult for us [verb] | 7 |
|
| 6 | [be] very difficult for us [verb] | 7 |
|
| 7 | be very difficult [prep] us [verb] | 7 |
|
| 8 | be very difficult [prep] us [verb] | 7 |
|
| 9 | be very difficult for we [verb] | 7 |
|
