| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be difficult for them | 31 |
|
| 2 | be difficult for they | 31 |
|
| 3 | is difficult for they | 13 |
|
| 4 | be difficult for they | 9 |
|
| 5 | was difficult for they | 5 |
|
