| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [vb pp] [prep] [be] necessary | 42 |
|
| 2 | be [vb pp] [prep] [be] necessary | 42 |
|
| 3 | [is] [vb pp] [prep] [be] necessary | 15 |
|
| 4 | is [vb pp] [prep] [be] necessary | 15 |
|
| 5 | [was/were] [vb pp] [prep] [be] necessary | 14 |
|
| 6 | was [vb pp] [prep] [be] necessary | 9 |
|
| 7 | [adv] [vb pp] [prep] [be] necessary | 7 |
|
| 8 | [adv] [vb pp] [prep] [be] necessary | 7 |
|
| 9 | [am/are] [vb pp] [prep] [be] necessary | 6 |
|
| 10 | are [vb pp] [prep] [be] necessary | 6 |
|
| 11 | were [vb pp] [prep] [be] necessary | 5 |
|
| 12 | [vb pp] [prep] [noun] [be] necessary | 5 |
|
| 13 | [vb pp] [prep] [be] necessary [prep] | 20 |
|
| 14 | [vb pp] [prep] [be] necessary [prep] | 20 |
|
| 15 | [vb pp] [prep] [be] necessary for | 14 |
|
| 16 | [vb pp] [prep] [be] necessary for | 14 |
|
| 17 | [vb pp] [prep] [be] necessary [verb] | 8 |
|
| 18 | [vb pp] [prep] [be] necessary [to-vb] | 8 |
|
