| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they [vb past] [prep] a | 1294 |
|
| 2 | they [vb past] [prep] a | 1294 |
|
| 3 | [pron] [vb past] at a | 464 |
|
| 4 | they [vb past] at [art] | 396 |
|
| 5 | they [verb] at a | 130 |
|
| 6 | they [vb past] at a | 91 |
|
