| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] be necessary for us | 13 |
|
| 2 | it be necessary for us | 13 |
|
| 3 | it be necessary for us | 13 |
|
| 4 | [pron] be necessary for us | 13 |
|
| 5 | be necessary for us [verb] | 12 |
|
| 6 | be necessary for us [to-vb] | 12 |
|
