| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [pron] very difficult for us | 5 |
|
| 2 | make [pron] very difficult for us | 5 |
|
| 3 | [pron] be very difficult for us | 7 |
|
| 4 | [pron] [be] very difficult for us | 7 |
|
| 5 | [pron] [is] very difficult for us | 6 |
|
