| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [verb] a [noun] | 14214 |
|
| 2 | be required [verb] [noun] | 326 |
|
| 3 | be required [verb] a | 259 |
|
| 4 | required [verb] a [noun] | 230 |
|
