| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [vb infin] at the time | 24 |
|
| 2 | could [vb infin] at [art] time | 10 |
|
| 3 | [vb mod] [vb infin] at a time | 9 |
|
| 4 | can [vb infin] at [art] time | 7 |
|
| 5 | may [vb infin] at [art] time | 7 |
|
