| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [det] a [noun sg] | 56 |
|
| 2 | could [vb infin] such a [noun sg] | 53 |
|
| 3 | could [vb infin] [det] a thing | 14 |
|
| 4 | could do [det] a [noun sg] | 7 |
|
