| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have [verb] [det] | 340 |
|
| 2 | they could have [verb] | 302 |
|
| 3 | they could [verb] [det] | 163 |
|
| 4 | they could have [det] | 13 |
|
| 5 | they have [verb] [det] | 13 |
|
