| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be required [to-vb] for | 14 |
|
| 2 | is required [to-vb] for | 9 |
|
| 3 | are required [to-vb] for | 7 |
|
| 4 | be required to account for | 6 |
|
| 5 | be required to pay for | 6 |
|
