| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | required [to-vb] in [noun sg] | 14 |
|
| 2 | required [to-vb] for [noun sg] | 11 |
|
| 3 | required [to-vb] with [noun sg] | 8 |
|
| 4 | required [to-vb] into [noun sg] | 6 |
|
| 5 | required [to-vb] by [noun sg] | 6 |
|
| 6 | required [to-vb] on [noun sg] | 5 |
|
