| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they could [not/n't] [vb infin] | 1283 |
|
| 2 | they could [not/n't] [verb] | 1283 |
|
| 3 | [pron] could [not/n't] believe | 516 |
|
| 4 | they [modal v] [not/n't] believe | 38 |
|
| 5 | they could [adv] believe | 22 |
|
| 6 | they could [not/n't] believe | 19 |
|
