| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | can [adv] have [been] [art] [adj] | 8 |
|
| 2 | can [adv] have [been] [art] [adj] | 8 |
|
| 3 | can [adv] have been [art] [adj] | 8 |
|
| 4 | can hardly have [been] [art] [adj] | 7 |
|
| 5 | can [adv] have [been] a [adj] | 5 |
|
