| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | and [unc] then when | 8 |
|
| 2 | and [unc] then when | 8 |
|
| 3 | and [no cls] then when | 8 |
|
| 4 | and er then when | 7 |
|
| 5 | and er then when | 7 |
|
