| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [verb] [prep] | 2121 |
|
| 2 | they could [not/n't] [verb] | 1267 |
|
| 3 | they could [verb] [prep] | 585 |
|
| 4 | they [not/n't] [verb] [prep] | 20 |
|
| 5 | they could [not/n't] [prep] | 9 |
|
