| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | i could [not/n't] [vb infin] | 4339 |
|
| 2 | [conj] i could [vb infin] | 2239 |
|
| 3 | [conj] i could [not/n't] | 1347 |
|
| 4 | [conj] could [not/n't] [vb infin] | 880 |
|
