| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is necessary [to-vb] | 1050 |
|
| 2 | it is also necessary | 65 |
|
| 3 | is also necessary [to-vb] | 52 |
|
| 4 | it is also [to-vb] | 11 |
|
