| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be difficult for [pron] [to-vb] | 116 |
|
| 2 | be for [pron] [to-vb] [art] | 51 |
|
| 3 | difficult for [pron] [to-vb] [art] | 36 |
|
