| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [adv] to [be] | 2967 |
|
| 2 | be required to [be] | 133 |
|
| 3 | be [adv] required to | 25 |
|
| 4 | [adv] required to [be] | 20 |
|
