| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they have [vb pp] [det] [noun sg] | 363 |
|
| 2 | could have [vb pp] [det] [noun sg] | 110 |
|
| 3 | they could have [vb pp] [noun sg] | 12 |
|
| 4 | they could have [vb pp] [det] | 11 |
|
