| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | required [to-vb] [adv prt] a | 18 |
|
| 2 | required [verb] out a | 6 |
|
| 3 | required take [adv prt] a | 5 |
|
| 4 | required to take [adv prt] a | 5 |
|
| 5 | required [verb] up a | 5 |
|
