| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be required [to-vb] [adj] [noun pl] | 36 |
|
| 2 | be required [verb] [adj] [noun pl] | 21 |
|
| 3 | be required [verb] [det] [noun pl] | 13 |
|
| 4 | be required [verb] such [noun pl] | 10 |
|
| 5 | be required [verb] such [noun pl] | 10 |
|
