| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it should be [vb pp] [be] | 8 |
|
| 2 | it should be [vb pp] be | 8 |
|
| 3 | it should be [vb pp] [be] | 8 |
|
| 4 | it should be [vb pp] [is] | 5 |
|
| 5 | it should be [vb pp] is | 5 |
|
