| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] very difficult for | 61 |
|
| 2 | it [be] very difficult for | 61 |
|
| 3 | it [be] very difficult for | 61 |
|
| 4 | it be very difficult for | 61 |
|
| 5 | it [is] very difficult for | 48 |
|
| 6 | it 's very difficult for | 25 |
|
| 7 | it is very difficult for | 23 |
|
| 8 | it [was/were] very difficult for | 13 |
|
| 9 | it was very difficult for | 13 |
|
