| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [vb infin] a [noun sg] | 946 |
|
| 2 | [adv] [vb infin] [vb pp] a [noun sg] | 300 |
|
| 3 | could [vb infin] [vb pp] a [noun sg] | 154 |
|
| 4 | could [adv] [vb infin] [vb pp] a | 131 |
|
| 5 | could [adv] [vb infin] [vb pp] [noun sg] | 45 |
|
