| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] be [verb] [prep] [verb] | 3513 |
|
| 2 | [vb mod] be [vb pp] [prep] [verb] | 3445 |
|
| 3 | [modal v] be required [prep] [verb] | 8 |
|
| 4 | [vb mod] be require [prep] [verb] | 8 |
|
| 5 | [vb mod] [be] required [prep] [verb] | 8 |
|
| 6 | [vb mod] be required [prep] [verb] | 8 |
|
| 7 | [vb mod] [be] required [prep] [verb] | 8 |
|
| 8 | [vb mod] be required [prep] [verb] | 8 |
|
