| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] have [verb] [prep] a | 53 |
|
| 2 | could [not/n't] have [verb] [prep] a | 53 |
|
| 3 | [modal v] [not/n't] have [verb] for a | 15 |
|
| 4 | could [adv] have [verb] for a | 14 |
|
| 5 | could [not/n't] [vb infin] [verb] for a | 12 |
|
| 6 | could [not/n't] [verb] [verb] for a | 12 |
|
| 7 | could [not/n't] have [verb] for a | 11 |
|
| 8 | could [not/n't] have [verb] for [art] | 11 |
|
| 9 | could [not/n't] have [verb] for a | 11 |
|
| 10 | could [not/n't] have [verb] for a | 11 |
|
| 11 | could [not/n't] have [verb] for [art] | 11 |
|
