| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [vb mod] [vb infin] [verb] in a | 6 |
|
| 2 | which [modal v] have [verb] in a | 5 |
|
| 3 | which [modal v] [vb infin] [vb pp] in a | 5 |
|
