| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [vb pp] [adv] a [noun sg] | 11 |
|
| 2 | could have [vb pp] [adv] a [noun] | 11 |
|
| 3 | could [vb infin] [vb pp] [adv prt] a [noun] | 9 |
|
| 4 | could [vb infin] [vb pp] up a [noun] | 5 |
|
| 5 | could [vb infin] [vb pp] up a [noun] | 5 |
|
