| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [noun prp] [modal v] [not/n't] [vb infin] | 841 |
|
| 2 | [conj] [noun] could [not/n't] [vb infin] | 493 |
|
| 3 | [conj] [noun prp] could [adv] [vb infin] | 483 |
|
| 4 | [conj] [noun prp] could [not/n't] [verb] | 311 |
|
