| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they [vb past] [vb pp] [prep] | 1864 |
|
| 2 | [pron] [vb past] [vb pp] at | 1032 |
|
| 3 | they [vb past] [verb] at | 199 |
|
| 4 | they [verb] [vb pp] at | 179 |
|
