| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | this [vb mod] [verb] [art] | 1963 |
|
| 2 | [adj] [vb mod] require [art] | 84 |
|
| 3 | this [vb mod] require [art] | 58 |
|
| 4 | this [modal v] require [art] | 58 |
|
