| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could not [vb infin] [adv] | 892 |
|
| 2 | could [adv] [vb infin] up | 375 |
|
| 3 | [modal v] not [vb infin] up | 334 |
|
| 4 | could not [vb infin] up | 210 |
|
| 5 | could [not/n't] [vb infin] up | 210 |
|
| 6 | could not [verb] up | 77 |
|
