| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it may [be] [adj] | 1788 |
|
| 2 | it may [be] [adj] | 1529 |
|
| 3 | it [modal v] [be] difficult | 527 |
|
| 4 | [pron] may [be] difficult | 119 |
|
| 5 | [pers pn] may [be] difficult | 107 |
|
| 6 | it may [be] difficult | 103 |
|
| 7 | it may [be] difficult | 103 |
|
| 8 | it may [be] difficult | 103 |
|
