| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [indef pn] could [verb] [art] | 287 |
|
| 2 | [indef pn] [verb] at [art] | 217 |
|
| 3 | could [verb] at [art] | 115 |
|
| 4 | [indef pn] could [verb] at | 18 |
|
