| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be necessary [to-vb] [pron] [prep] [art] | 20 |
|
| 2 | be necessary [verb] [pron] [prep] [art] | 20 |
|
| 3 | be necessary [verb] [pron] [prep] the | 18 |
|
| 4 | be necessary [verb] [pron] [prep] the | 18 |
|
| 5 | be necessary [verb] [pers pn] [prep] [art] | 15 |
|
| 6 | is necessary [verb] [pron] [prep] [art] | 9 |
|
| 7 | be necessary [verb] it [prep] [art] | 8 |
|
| 8 | be necessary [verb] it [prep] [art] | 8 |
|
| 9 | be necessary [verb] [pron] [prep] [art] | 6 |
|
