| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is necessary [verb] [prep] | 156 |
|
| 2 | is necessary [to-vb] [prep] | 155 |
|
| 3 | is necessary [verb] in | 27 |
|
| 4 | is necessary [verb] in | 27 |
|
| 5 | is necessary look [prep] | 25 |
|
| 6 | is necessary to look [prep] | 25 |
|
| 7 | is necessary [verb] to | 24 |
|
| 8 | is necessary [verb] to | 24 |
|
| 9 | is necessary [verb] for | 18 |
|
| 10 | is necessary [verb] for | 18 |
|
| 11 | is necessary [verb] at | 17 |
|
| 12 | is necessary [verb] at | 17 |
|
| 13 | is necessary [verb] with | 12 |
|
| 14 | is necessary [verb] with | 12 |
|
| 15 | is necessary [verb] between | 12 |
|
| 16 | is necessary [verb] between | 12 |
|
| 17 | is necessary [verb] into | 12 |
|
| 18 | is necessary [verb] into | 12 |
|
| 19 | is necessary to distinguish [prep] | 11 |
|
| 20 | is necessary distinguish [prep] | 11 |
|
| 21 | is necessary [verb] on | 10 |
|
| 22 | is necessary [verb] on | 10 |
|
| 23 | is necessary to refer [prep] | 8 |
|
| 24 | is necessary refer [prep] | 8 |
|
| 25 | is necessary to take [prep] | 7 |
|
| 26 | is necessary take [prep] | 7 |
|
| 27 | is necessary to know [prep] | 5 |
|
| 28 | is necessary go [prep] | 5 |
|
| 29 | is necessary know [prep] | 5 |
|
| 30 | is necessary to go [prep] | 5 |
|
