| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [conj] [v-ing] [prep] [art] | 323 |
|
| 2 | [verb] while [v-ing] [prep] [art] | 67 |
|
| 3 | [vb pp] while [verb] [prep] [art] | 31 |
|
| 4 | [vb pp] while [v-ing] [prep] [art] | 29 |
|
