| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | that it be difficult for | 25 |
|
| 2 | that it [is] difficult for | 18 |
|
| 3 | that it is difficult for | 16 |
|
| 4 | that it was difficult for | 7 |
|
| 5 | that it [was/were] difficult for | 7 |
|
