| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may be [verb] [prep] [adj] | 805 |
|
| 2 | may be difficult [verb] [prep] | 34 |
|
| 3 | be difficult [verb] [prep] [adj] | 13 |
|
| 4 | may be difficult [verb] [adj] | 8 |
|
