| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] is [verb] | 11267 |
|
| 2 | [Wh det] is [vb pp] | 8362 |
|
| 3 | [Wh det] [be] required | 380 |
|
| 4 | [Wh det] be required | 380 |
|
| 5 | [pron] is required | 370 |
|
| 6 | [Wh det] [is] required | 256 |
|
| 7 | [Wh det] is require | 249 |
|
