| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be difficult for [pron] [verb] | 117 |
|
| 2 | be difficult for [pron] [to-vb] | 116 |
|
| 3 | be [adj] for [pron] to understand | 15 |
|
| 4 | be [adj] for [pron] to understand | 15 |
|
| 5 | be difficult for [pron] to understand | 6 |
|
| 6 | be difficult [prep] [pron] to understand | 6 |
|
| 7 | [be] difficult for [pron] to understand | 6 |
|
| 8 | be difficult for [pron] understand | 6 |
|
