| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] be required to be | 30 |
|
| 2 | [vb mod] be required to be | 17 |
|
| 3 | [noun sg] [vb mod] be required to | 13 |
|
| 4 | [noun sg] [vb mod] be to be | 7 |
|
