| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be necessary [to-vb] [noun sg] | 160 |
|
| 2 | be [to-vb] into [noun sg] | 53 |
|
| 3 | be necessary [to-vb] into | 16 |
|
| 4 | necessary [to-vb] into [noun sg] | 13 |
|
