| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it may [vb infin] necessary | 16 |
|
| 2 | it may [verb] necessary | 16 |
|
| 3 | it may become necessary | 9 |
|
| 4 | it may become necessary | 9 |
|
| 5 | it may prove necessary | 5 |
|
| 6 | it may prove necessary | 5 |
|
