| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [verb] [art] | 53501 |
|
| 2 | while [verb] [art] | 1390 |
|
| 3 | [vb past] while [verb] | 104 |
|
| 4 | [vb past] while [art] | 63 |
|
