| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could n't [verb] [prep] | 1115 |
|
| 2 | could [verb] [prep] a | 1099 |
|
| 3 | n't [verb] [prep] a | 877 |
|
| 4 | could n't [verb] a | 501 |
|
