| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be necessary [verb] that [adj] [noun pl] | 10 |
|
| 2 | be necessary [verb] [conj] [adj] [noun pl] | 10 |
|
| 3 | be necessary [verb] [that] [adj] [noun pl] | 10 |
|
| 4 | be necessary [verb] that [adj] [noun pl] | 10 |
|
| 5 | be necessary [to-vb] [conj] [adj] [noun pl] | 10 |
|
| 6 | is necessary [verb] [conj] [adj] [noun pl] | 6 |
|
| 7 | be necessary ensure [conj] [adj] [noun pl] | 6 |
|
| 8 | be necessary to ensure [conj] [adj] [noun pl] | 6 |
|
| 9 | be necessary [verb] [conj] [adj] [noun pl] | 5 |
|
