| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [adv] [been] [v-ing] at | 17 |
|
| 2 | [vb past] [adv] been [v-ing] at | 17 |
|
| 3 | [vb past] [adv] be [v-ing] at | 17 |
|
| 4 | had [adv] [be] [v-ing] at | 15 |
|
| 5 | [vb past] [adv] [be] [v-ing] at | 13 |
|
