| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] not [verb] [conj] [vb infin] | 274 |
|
| 2 | could [adv] [verb] [conj] [vb infin] | 232 |
|
| 3 | could not [verb] [conj] [verb] | 118 |
|
| 4 | could [not/n't] [verb] [conj] [vb infin] | 86 |
|
| 5 | could not [verb] [conj] [vb infin] | 86 |
|
