| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be necessary for us [verb] | 12 |
|
| 2 | [be] necessary for us [verb] | 12 |
|
| 3 | [is] necessary for us [verb] | 10 |
|
| 4 | is necessary for us [verb] | 9 |
|
| 5 | [adv] necessary for us [verb] | 5 |
|
| 6 | [adv] necessary for us [verb] | 5 |
|
| 7 | necessary for us [verb] [pron] | 6 |
|
