| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] require a | 304 |
|
| 2 | [conj] [modal v] require | 143 |
|
| 3 | [conj] require a | 123 |
|
| 4 | [conj] [modal v] a | 116 |
|
