| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it may be [adj] for | 160 |
|
| 2 | it [vb mod] be difficult for | 80 |
|
| 3 | it [modal v] be difficult for | 80 |
|
| 4 | it may be difficult [prep] | 23 |
|
| 5 | it may be difficult [prep] | 23 |
|
| 6 | it may be difficult for | 19 |
|
| 7 | [pron] may be difficult for | 19 |
|
| 8 | it may be difficult for | 19 |
|
| 9 | it may [be] difficult for | 19 |
|
