| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [Wh det] [noun pl] [modal v] [vb infin] | 18 |
|
| 2 | at [Wh det] [noun pl] [vb mod] [verb] | 18 |
|
| 3 | at which [noun pl] [modal v] [verb] | 16 |
|
| 4 | at [Wh det] [noun pl] can [verb] | 7 |
|
| 5 | at [Wh det] [noun pl] can [verb] | 7 |
|
