| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] to [be] | 91056 |
|
| 2 | [vb pp] to [be] | 20110 |
|
| 3 | require to [be] | 373 |
|
| 4 | required to [be] | 211 |
|
| 5 | required [prep] [be] | 211 |
|
| 6 | required [prep] [be] | 211 |
|
| 7 | required to [be] | 211 |
|
