| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] at [adj] time | 139 |
|
| 2 | could [vb infin] at [adj] | 124 |
|
| 3 | could [vb infin] [adj] time | 41 |
|
| 4 | could at [adj] time | 10 |
|
