| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [verb] at any [noun sg] | 8 |
|
| 2 | could [vb infin] [verb] at any [noun] | 8 |
|
| 3 | could [vb infin] [vb pp] at any [noun] | 8 |
|
| 4 | could [vb infin] [verb] at any time | 7 |
|
| 5 | could have [verb] at any [noun] | 7 |
|
| 6 | could [vb infin] [verb] at any time | 7 |
|
| 7 | could [vb infin] happen at any [noun] | 5 |
|
| 8 | could [vb infin] happened at any [noun] | 5 |
|
