| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have [vb pp] [pos pn] [noun sg] | 149 |
|
| 2 | [pron] could have [vb pp] [pos pn] | 135 |
|
| 3 | [pron] could have [vb pp] [noun sg] | 74 |
|
| 4 | [pron] could have [pos pn] [noun sg] | 34 |
|
| 5 | [pron] have [vb pp] [pos pn] [noun sg] | 19 |
|
