| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | required [to-vb] out the [noun] | 12 |
|
| 2 | required to carry out the [noun] | 10 |
|
| 3 | required carry out the [noun] | 10 |
|
| 4 | required [verb] out the [noun sg] | 6 |
|
| 5 | required [verb] out the [noun pl] | 5 |
|
