| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be necessary [verb] [adj] [noun pl] | 121 |
|
| 2 | be [adj] [verb] two [noun pl] | 69 |
|
| 3 | [be] necessary [verb] two [noun pl] | 10 |
|
| 4 | be necessary [verb] two [noun] | 10 |
|
