| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] have [verb] [prep] a | 80 |
|
| 2 | could [adv] have [verb] [prep] a | 80 |
|
| 3 | [modal v] [adv] have [verb] for a | 27 |
|
| 4 | could [adv] [verb] [verb] for a | 16 |
|
| 5 | could [adv] [vb infin] [verb] for a | 16 |
|
| 6 | could [adv] have [verb] for [art] | 15 |
|
| 7 | could [adv] have [verb] for [art] | 15 |
|
| 8 | could [adv] have [verb] for a | 14 |
|
| 9 | could [adv] have [verb] for a | 14 |
|
| 10 | could [adv] have [verb] for a | 14 |
|
