| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [adj] [pron] could | 350 |
|
| 2 | at [adj] [pron] [vb mod] | 310 |
|
| 3 | at [adj] [pron] [modal v] | 310 |
|
| 4 | at [adj] [pron] could | 89 |
|
