| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it may be necessary [prep] [noun] | 8 |
|
| 2 | it may be necessary [prep] [noun] | 8 |
|
| 3 | it may be necessary [prep] [noun] | 8 |
|
| 4 | it may be necessary [prep] [noun] | 8 |
|
| 5 | it may be necessary [prep] [noun sg] | 5 |
|
| 6 | it may be necessary for [noun] | 5 |
|
| 7 | it may be necessary for [noun] | 5 |
|
