| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [not/n't] [verb] a | 3870 |
|
| 2 | [vb mod] [not/n't] [verb] a | 3870 |
|
| 3 | could [not/n't] [verb] [art] | 2786 |
|
| 4 | could [not/n't] [verb] [art] | 2786 |
|
| 5 | could [adv] [verb] a | 1494 |
|
| 6 | could [not/n't] [verb] a | 927 |
|
| 7 | could [not/n't] [verb] a | 847 |
|
