| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] be [verb] to | 10340 |
|
| 2 | [vb mod] be [vb pp] to | 9702 |
|
| 3 | [vb mod] be required [prep] | 278 |
|
| 4 | [vb mod] be required [prep] | 278 |
|
| 5 | [vb mod] [be] required to | 32 |
|
| 6 | [modal v] be required to | 32 |
|
| 7 | [vb mod] be required to | 32 |
|
| 8 | [vb mod] be required to | 32 |
|
| 9 | [vb mod] be require to | 32 |
|
| 10 | [vb mod] [be] required to | 32 |
|
