| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what can not be [vb pp] [be] | 6 |
|
| 2 | what can [not/n't] be [vb pp] be | 6 |
|
| 3 | what can [not/n't] be [vb pp] is | 5 |
|
| 4 | what can [not/n't] be [vb pp] [is] | 5 |
|
