| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adv] [verb] to [be] | 984 |
|
| 2 | is [adv] [vb pp] to [be] | 692 |
|
| 3 | [be] [adv] required to [be] | 15 |
|
| 4 | be [adv] required to [be] | 15 |
|
| 5 | is [adv] required to [be] | 5 |
|
| 6 | is [adv] require to [be] | 5 |
|
| 7 | [is] [adv] required to [be] | 5 |
|
| 8 | is [adv] required [prep] [be] | 5 |
|
