| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at which it [verb] | 52 |
|
| 2 | at which it [verb] | 52 |
|
| 3 | at which it [vb -s] | 27 |
|
| 4 | at which it [vb past] | 25 |
|
| 5 | at which it have | 9 |
|
| 6 | at which it had | 8 |
|
