| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [vb past] at | 2876 |
|
| 2 | [conj] [vb past] [v-ing] | 2008 |
|
| 3 | [conj] [v-ing] at | 1428 |
|
| 4 | [vb past] [v-ing] at | 551 |
|
