| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [vb mod] [be] required [prep] be | 13 |
|
| 2 | [noun sg] [vb mod] [be] required [prep] be | 8 |
|
| 3 | [vb mod] [be] required [prep] be [verb] | 14 |
|
| 4 | [vb mod] [be] required [prep] be [vb pp] | 14 |
|
