| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it may be [adj] [prep] [noun] | 59 |
|
| 2 | it [modal v] be necessary [prep] [noun] | 16 |
|
| 3 | [pron] may be necessary [prep] [noun] | 9 |
|
| 4 | it may [be] necessary [prep] [noun] | 8 |
|
