| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which they [vb mod] [verb] a | 20 |
|
| 2 | which they [modal v] [vb infin] a | 19 |
|
| 3 | which they can [verb] a | 6 |
|
| 4 | which they can [verb] a | 6 |
|
