| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [verb] [prep] a | 577 |
|
| 2 | [vb base] [pron] [verb] [prep] a | 551 |
|
| 3 | [vb base] [pron] could [verb] [prep] | 123 |
|
| 4 | [vb base] [pron] could [verb] a | 83 |
|
