| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be necessary ensure that [adj] [noun] | 8 |
|
| 2 | [be] necessary ensure that [adj] [noun] | 8 |
|
| 3 | necessary ensure that [adj] [noun] be | 5 |
|
| 4 | necessary ensure that [adj] [noun] [be] | 5 |
|
