| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | was necessary [prep] the | 68 |
|
| 2 | [was/were] necessary for the | 57 |
|
| 3 | were necessary [prep] the | 16 |
|
| 4 | [was/were] necessary in the | 11 |
|
| 5 | [was/were] necessary to the | 9 |
|
