| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [det] have be [vb pp] | 1898 |
|
| 2 | could have be [vb pp] | 1057 |
|
| 3 | [det] could be [vb pp] | 740 |
|
| 4 | [det] could have be | 127 |
|
| 5 | [det] could have [vb pp] | 75 |
|
