| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] be difficult for [pron] [verb] | 30 |
|
| 2 | [modal v] be difficult for [pron] [verb] | 30 |
|
| 3 | may be [adj] for [pron] [verb] | 26 |
|
| 4 | may be [adj] for [pron] [verb] | 25 |
|
| 5 | may be difficult for [pron] [verb] | 8 |
|
| 6 | may be difficult [prep] [pron] [verb] | 8 |
|
| 7 | may be difficult [prep] [pron] [verb] | 8 |
|
| 8 | may be difficult for [pron] [verb] | 8 |
|
| 9 | may be difficult for [pron] [verb] | 8 |
|
| 10 | may [be] difficult for [pron] [verb] | 8 |
|
