| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be require [prep] be [verb] | 17 |
|
| 2 | be require to be [verb] | 17 |
|
| 3 | be required [prep] be [verb] | 17 |
|
| 4 | be require [prep] be [vb pp] | 17 |
|
