| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when i [vb past] [prep] | 1037 |
|
| 2 | when [pron] [vb past] at | 593 |
|
| 3 | [conj] i [vb past] at | 445 |
|
| 4 | [subord] i [vb past] at | 283 |
|
| 5 | when i [verb] at | 171 |
|
| 6 | when i [vb past] at | 113 |
|
