| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it may be [prep] [noun] | 42 |
|
| 2 | it may be necessary [prep] | 37 |
|
| 3 | it be necessary [prep] [noun] | 31 |
|
| 4 | may be necessary [prep] [noun] | 16 |
|
