| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be difficult for them | 17 |
|
| 2 | it be difficult for they | 17 |
|
| 3 | it be difficult for they | 17 |
|
| 4 | it be difficult for they | 17 |
|
| 5 | it is difficult for they | 13 |
|
