| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [verb] [verb] to | 3284 |
|
| 2 | be [vb pp] [verb] to | 2344 |
|
| 3 | be required [verb] [prep] | 334 |
|
| 4 | [be] required [verb] to | 62 |
|
| 5 | be require [verb] to | 62 |
|
