| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could not [vb infin] [noun sg] [noun sg] | 17 |
|
| 2 | could not [vb infin] [noun sg] [noun sg] | 11 |
|
| 3 | could n't [vb infin] [noun sg] [noun sg] | 6 |
|
