| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be for [det] [noun pl] | 188 |
|
| 2 | be required for [det] | 69 |
|
| 3 | required for [det] [noun pl] | 26 |
|
| 4 | be required for [noun pl] | 22 |
|
