| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they [verb] [v-ing] at [art] [noun sg] | 7 |
|
| 2 | they [verb] [v-ing] at the [noun sg] | 7 |
|
| 3 | they [vb past] [v-ing] at [art] [noun sg] | 5 |
|
