| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [pron] [modal v] | 7098 |
|
| 2 | [pron] [modal v] then | 2132 |
|
| 3 | which [modal v] then | 301 |
|
| 4 | which [pron] then | 125 |
|
