| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they could not [vb infin] to | 16 |
|
| 2 | they could not [verb] to | 16 |
|
| 3 | they could n't [verb] to | 9 |
|
| 4 | they could not [verb] to | 7 |
|
