| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [modal v] [verb] [verb] | 1500 |
|
| 2 | [pron] [modal v] [verb] [vb infin] | 373 |
|
| 3 | [Wh det] [modal v] [verb] [vb infin] | 76 |
|
| 4 | which [modal v] [verb] [vb infin] | 75 |
|
